lim[1/(x+1)-3/(x^3+1)],x趋于-1 等于多少?为什么
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lim[1/(x+1)-3/(x^3+1)],x趋于-1 等于多少?为什么
lim[1/(x+1)-3/(x^3+1)],x趋于-1 等于多少?
为什么
lim[1/(x+1)-3/(x^3+1)],x趋于-1 等于多少?为什么
1/(x+1)-3/(x^3+1)=(x^2-x-2)/(x^3+1)=(x-2)/(x^2-x+1)
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