Question

Helppp
lim f (x)/x-2=-9
x->2
f (x)=-x^3+3x+2
Cum rezolvi inlocuiesti pur si simplu sau cum ?? :o

Answer 1

[tex]\lim_{x \to 2 } \dfrac{f(x)}{x-2} = \lim_{x \to 2 } \dfrac{-x^3+3x+2}{x-2} \overset{\boxed{\frac{0}{0} } } = \lim_{x \to 2 } \dfrac{(-x^3+3x+2)^'}{(x-2)'}= \\ \\ =\lim_{x \to 2 } \dfrac{-3x^2+3}{1} = -3\cdot2^2+3 = -12+3 = -9 [/tex]

Answer 2

Ai caz de exceptie folosesti l'hopital (derivezi sus si jos)si dupa inlocuiesti cu 2