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13-01-2024
Mathematics

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EXERCICE .1. Soit f(x) = 2x7 + 3x + 4 définie sur R.
1. Étudier le signe de f'(x) selon les valeurs de x.
2. En déduire les variations de f.
3. Dresser le tableau des variations de f en y indiquant le signe de la fonction dérivée. 4. Montrer que f admet un extremum.
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