lim(x→∞)(x+1/x-1)^(2x)= 要具体过程,谢谢

如题所述

第1个回答  2012-01-06
lim趋于无穷 x^2-1/2x^2-x-1 =lim趋于无穷 (x+1)(x-1)/(x-1)(2x+1) ==lim趋于无穷 (x+1)/(2x+1) =1/2 1/2 看不明白
第2个回答  推荐于2016-12-02
lim(x→∞)(x+1/x-1)^(2x)
=lim(x→∞)(1+2/x-1)^(2x)
=lim(x→∞)【1+2/x】^(2x)
=lim(x→∞)【1+2/x】^(x/2)*4
=e^4追问

最后一步不太懂,是运用公式吗?还是用的幂指函数的方法?

追答

=lim(x→∞)【1+2/x】^(x/2)
=e
是运用公式
=lim(x→∞)【1+2/x】^[(x/2)*4]
=e^4

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lim(x→∞)(x+1\/x-1)^(2x)= 要具体过程,谢谢
lim(x→∞)(x+1\/x-1)^(2x)=lim(x→∞)(1+2\/x-1)^(2x)=lim(x→∞)【1+2\/x】^(2x)=lim(x→∞)【1+2\/x】^(x\/2)*4 =e^4

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