lim (x^3+2x-1)/(2x^3+x^2-2)x趋于正无穷,怎么算?
1个回答
分子和分母都除以x³,得
=lim (1+2/x² -1/x³)/(2+1/x -2/x³)
= (1+0 -0)/(2+0 -0)
=1/2
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