作业帮x趋向正无穷 lim[(x+a)/(x-a)]^x利用x趋向正无穷 lim(1+1/x)^x=e
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x趋向正无穷 lim[(x+a)/(x-a)]^x利用x趋向正无穷 lim(1+1/x)^x=e
x趋向正无穷 lim[(x+a)/(x-a)]^x
利用x趋向正无穷 lim(1+1/x)^x=e
x趋向正无穷 lim[(x+a)/(x-a)]^x利用x趋向正无穷 lim(1+1/x)^x=e
lim[(x+a)/(x-a)]^x
=lim[1+2a/(x-a)]^{[(x-a)/2a]*[2ax/(x-a)]}
=e^lim[2ax/(x-a)]=e^(2a)