作业帮f(x)=(1/x)/[1-(1/x)^2] 怎么转换到下面这一步 f(x)=x/(x^2-1)如题
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f(x)=(1/x)/[1-(1/x)^2] 怎么转换到下面这一步 f(x)=x/(x^2-1)如题
f(x)=(1/x)/[1-(1/x)^2] 怎么转换到下面这一步 f(x)=x/(x^2-1)
如题
f(x)=(1/x)/[1-(1/x)^2] 怎么转换到下面这一步 f(x)=x/(x^2-1)如题
f(x)=(1/x)/[1-(1/x)^2]
=（1/x）/(1-1/x²)
=(1/x)/(x²-1)/(x²)
=(1/x)×x²/(x²-1)
=x/(x²-1);
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^是什么
(1/x)/[1-(1/x)^2]=(1/x)/[1-(1/x^2)]=(1/x)/[x^2/x^2-(1/x^2)]=(1/x)/[(x^2-1)/x^2]=x/(x^2-1)。
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