Calculer C'M(x) avec CM(x)= (1/3x³-1/4x²-1/2x+2)/x
On doit trouver C'M(x)= f(x)/12x² avec f(x)= 8x³-3x²-24
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CM'(x)=(x(x²-1/2x-1/2)-1/3x³+1/4x²+1/2x-2)/x²
=(x³-1/2x²-1/2x-1/3x³+1/4x²+1/2x-2)/x²
=(2/3x³-1/4x²-2)/x²
=(8x²-3x²-24)/(12x²)