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limfxgx等于limfxlimgx证明
limfxgx=limfxlimgx
limfx^gx
limfx-gx=0
lim(fx^gx)=[lim(fx)]^lim(gx)
limf(gx)=f(limgx)
limfx=∞,limgx=∞
limf(x)/g(x)=c≠0
limfxgx和limfx都存在
limg(x)f(x)
limf(x)/g(x)=0
limf(x)=limg(x)=0
limf(x)/g(x)=1
lim[f(x)+g(x)]=limf(x)+limg(x)
limf(x)=∞,limg(x)=∞
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