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Updated Mar 21, 2026

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Révisions Maths Spé : Guide sur la Dérivation

La dérivation est l'un des concepts les plus importants en... Show more

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-MATHS-

Dérivation - part. 1

taux de variation
le taux de variation d'une fonction
$f$ entre a+h est le nombre:

+(n) = $\frac{f(a+h)-f(a)

Les bases de la dérivation

Tu veux comprendre comment une fonction évolue ? Le taux de variation est ton point de départ ! C'est simplement la "vitesse" à laquelle ta fonction change entre deux points.

Pour calculer ce taux entre deux valeurs aa et bb, tu utilises la formule : f(b)f(a)ba\frac{f(b) - f(a)}{b - a}. Imagine que tu mesures la pente d'une montagne entre deux points.

Le nombre dérivé f(a)f'(a) apparaît quand tu fais tendre cette pente vers un point précis. Mathématiquement : limh0f(a+h)f(a)h=f(a)\lim_{h \to 0} \frac{f(a+h) - f(a)}{h} = f'(a).

💡 Astuce pratique : La dérivée en un point te donne directement le coefficient directeur de la tangente à la courbe en ce point !

-MATHS-

Dérivation - part. 1

taux de variation
le taux de variation d'une fonction
$f$ entre a+h est le nombre:

+(n) = $\frac{f(a+h)-f(a)

Équation de la tangente et fonctions usuelles

Maintenant que tu maîtrises le concept, voici l'équation magique de la tangente en un point : y=f(a)(xa)+f(a)y = f'(a)(x-a) + f(a). Retiens-la par cœur, elle tombe souvent aux contrôles !

Une fonction dérivable sur un intervalle II possède une dérivée en chaque point de cet intervalle. La fonction dérivée f(x)f'(x) associe à chaque xx son nombre dérivé.

Voici les dérivées essentielles à connaître absolument :

  • Constante : (k)=0(k)' = 0
  • Polynômes : (xn)=nxn1(x^n)' = nx^{n-1}
  • Inverse : (1x)=1x2(\frac{1}{x})' = -\frac{1}{x^2}
  • Racine : (x)=12x(\sqrt{x})' = \frac{1}{2\sqrt{x}}

🎯 Pour les exams : Ces formules de base représentent 80% des calculs de dérivées que tu rencontreras !

-MATHS-

Dérivation - part. 1

taux de variation
le taux de variation d'une fonction
$f$ entre a+h est le nombre:

+(n) = $\frac{f(a+h)-f(a)

Règles de calcul avancées

Maintenant, on passe aux opérations sur les dérivées ! Ces règles te permettront de dériver n'importe quelle fonction complexe.

Pour la somme et le produit, c'est assez intuitif : (u+v)=u+v(u+v)' = u' + v' et (ku)=ku(ku)' = ku'. Par contre, attention au produit : (uv)=uv+uv(uv)' = u'v + uv' (pas $u'v'$ !).

Les quotients demandent plus de rigueur. Pour 1v\frac{1}{v} : (1v)=vv2(\frac{1}{v})' = \frac{-v'}{v^2}. Pour uv\frac{u}{v} : (uv)=uvuvv2(\frac{u}{v})' = \frac{u'v - uv'}{v^2}.

La dérivée composée f(x)=g(mx+p)f(x) = g(mx+p) suit cette règle : f(x)=mg(mx+p)f'(x) = mg'(mx+p). Le facteur mm apparaît toujours devant !

⚡ Méthode rapide : Pour éviter les erreurs dans les quotients, pense toujours "dérivée du haut × bas - haut × dérivée du bas, le tout sur bas au carré" !



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What is the Knowunity AI companion?

Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.

Where can I download the Knowunity app?

You can download the app from Google Play Store and Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

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Most popular content in Maths

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Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

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App Store

4.7/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

 

Maths

434

Updated Mar 21, 2026

3 pages

Révisions Maths Spé : Guide sur la Dérivation

La dérivation est l'un des concepts les plus importants en maths de Terminale. C'est ton outil principal pour analyser comment les fonctions évoluent et pour tracer leurs courbes avec précision.

-MATHS-

Dérivation - part. 1

taux de variation
le taux de variation d'une fonction
$f$ entre a+h est le nombre:

+(n) = $\frac{f(a+h)-f(a)

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

Les bases de la dérivation

Tu veux comprendre comment une fonction évolue ? Le taux de variation est ton point de départ ! C'est simplement la "vitesse" à laquelle ta fonction change entre deux points.

Pour calculer ce taux entre deux valeurs aa et bb, tu utilises la formule : f(b)f(a)ba\frac{f(b) - f(a)}{b - a}. Imagine que tu mesures la pente d'une montagne entre deux points.

Le nombre dérivé f(a)f'(a) apparaît quand tu fais tendre cette pente vers un point précis. Mathématiquement : limh0f(a+h)f(a)h=f(a)\lim_{h \to 0} \frac{f(a+h) - f(a)}{h} = f'(a).

💡 Astuce pratique : La dérivée en un point te donne directement le coefficient directeur de la tangente à la courbe en ce point !

-MATHS-

Dérivation - part. 1

taux de variation
le taux de variation d'une fonction
$f$ entre a+h est le nombre:

+(n) = $\frac{f(a+h)-f(a)

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

Équation de la tangente et fonctions usuelles

Maintenant que tu maîtrises le concept, voici l'équation magique de la tangente en un point : y=f(a)(xa)+f(a)y = f'(a)(x-a) + f(a). Retiens-la par cœur, elle tombe souvent aux contrôles !

Une fonction dérivable sur un intervalle II possède une dérivée en chaque point de cet intervalle. La fonction dérivée f(x)f'(x) associe à chaque xx son nombre dérivé.

Voici les dérivées essentielles à connaître absolument :

  • Constante : (k)=0(k)' = 0
  • Polynômes : (xn)=nxn1(x^n)' = nx^{n-1}
  • Inverse : (1x)=1x2(\frac{1}{x})' = -\frac{1}{x^2}
  • Racine : (x)=12x(\sqrt{x})' = \frac{1}{2\sqrt{x}}

🎯 Pour les exams : Ces formules de base représentent 80% des calculs de dérivées que tu rencontreras !

-MATHS-

Dérivation - part. 1

taux de variation
le taux de variation d'une fonction
$f$ entre a+h est le nombre:

+(n) = $\frac{f(a+h)-f(a)

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

Règles de calcul avancées

Maintenant, on passe aux opérations sur les dérivées ! Ces règles te permettront de dériver n'importe quelle fonction complexe.

Pour la somme et le produit, c'est assez intuitif : (u+v)=u+v(u+v)' = u' + v' et (ku)=ku(ku)' = ku'. Par contre, attention au produit : (uv)=uv+uv(uv)' = u'v + uv' (pas $u'v'$ !).

Les quotients demandent plus de rigueur. Pour 1v\frac{1}{v} : (1v)=vv2(\frac{1}{v})' = \frac{-v'}{v^2}. Pour uv\frac{u}{v} : (uv)=uvuvv2(\frac{u}{v})' = \frac{u'v - uv'}{v^2}.

La dérivée composée f(x)=g(mx+p)f(x) = g(mx+p) suit cette règle : f(x)=mg(mx+p)f'(x) = mg'(mx+p). Le facteur mm apparaît toujours devant !

⚡ Méthode rapide : Pour éviter les erreurs dans les quotients, pense toujours "dérivée du haut × bas - haut × dérivée du bas, le tout sur bas au carré" !

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.

Where can I download the Knowunity app?

You can download the app from Google Play Store and Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

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Most popular content: pente de la tangente

Most popular content in Maths

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Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.6/5

App Store

4.7/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user