coucou
1) f'(x) = 15x² -8x +2
2) f'(x) = u'v + uv' = -14x*(2+Vx)+ (-7x²+3)* 1/(2Vx)= -28x-14xVx+(-7x²+3)/(2Vx)
= (-56xVx -28x²-7x²+3)/(2Vx)
= (-56xVx -35x²+3)/(2Vx)
3) f'(x) = u'v + uv'
= (3x²-2)*5/x + (x³-2x)*-5/x²
= (15x²-10)/x + (-5x³+10x)/x²
= (15x³-10x-5x³+10x)/x²
= 10x³/x²
= 10x
4) (u'v-uv')/v²
= (5x⁴(4x-3) - x⁵*4)/(4x-3)²
= (20x⁵-15x⁴ -4x⁵)/(4x-3)²
= (16x⁵-15x⁴)/(4x-3)
5) je ne sais plus c'est quoi la formule desoler
voila j espere t avoir aider
