Réponses

2014-01-19T16:31:28+01:00
1. u'(x) = 2x   et v'(x) = 1/2Vx
2.f'(x) = (2x.Vx - x²1/2Vx)x =( 4x² - x²)/2xVx = 3x²/2xVx ou 3x/2Vx
3. f(4) = 16/2 = 8 et f'(4) = 12/4 = 3 
Ta : y = 3(x-4) + 8 => y = 3x -12 + 8 => y = 3x - 4