lim (1-X-X^3)/(x+x^3) X 趋于正无穷 极限无穷小?
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lim(1-X-X^3)/(x+x^3)X趋于正无穷极限无穷小?lim(1-X-X^3)/(x+x^3)X趋于正无穷极限无穷小?lim(1-X-X^3)/(x+x^3)X趋于正无穷极限无穷小?上下除以
lim (1-X-X^3)/(x+x^3) X 趋于正无穷 极限无穷小?
lim (1-X-X^3)/(x+x^3) X 趋于正无穷 极限无穷小?
lim (1-X-X^3)/(x+x^3) X 趋于正无穷 极限无穷小?
上下除以x³
原式=lim(1/x³-1/x²-1)/(1/x²+1)
=(0-0-1)/(0+1)
=-1
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