323

a)

derivaatta on -3
b)
$f'\left(-2\right)=\lim_{x\rightarrow-2}\ \frac{x^2+x-2}{x+2}=\lim_{x\rightarrow-2}\ \frac{\left(x+2\right)\left(x-1\right)}{x+2}=\lim_{x\rightarrow-2}\left(x-1\right)=-2-1=-3$