Вычислите:
[tex] \lim_{x \to \ 1} \frac{2 x^{2}-x -1 }{ x^{3}+2 x^{2} -x-2 }[/tex]

2x²-x-1=2(x+1/2)(x-1)=(2x+1)(x-1)D=1+8=9x1=(1-3)/4=-1/2x2=(1+30/4=1x³+2x²-x-2=x²(x+2)-(x+2)=(x+2)(x²-1)=(x+2)(x-1)(x+1)(2x²-x-1)/(x³+2x²-x-2)=(2x+1)(x-1)/(x+2)(x-1)(x+1)=(2x+1)/(x+2)(x+1)lim(2x+1)/(x+2)(x+1)=(2+1)/(1+2)(x+1)=3/3*2=1/2