急!!!计算下列各极限
limx^2+2x-2x->-1---------x^2+1limx->无穷(1+1/x)(2-1/x^2)limx->-1(x^2+2x-2)/(x^2+1)...
lim x^2+2x-2
x->-1 ---------
x^2+1
lim
x->无穷 (1+1/x)(2-1/x^2)
lim
x->-1 (x^2+2x-2)/(x^2+1) 展开
x->-1 ---------
x^2+1
lim
x->无穷 (1+1/x)(2-1/x^2)
lim
x->-1 (x^2+2x-2)/(x^2+1) 展开
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