数学题目。。

Question

数学题目。。写一下详细步骤

Answer 1

如图所示

Answer 2

1-x³=(1-x)(1+x+x²)
原式=lim(x->1)[(1+x+x²)/(1-x³)-3/(1-x³)]
=lim(x->1)（x²+x-2)/(1-x³)
=lim(x->1)-(1-x)(x+2)/(1-x)(1+x+x²)
=lim(x->1) -(x+2)/(1+x+x²)
=-3/3
=-1本回答被提问者采纳