求极限lim(x->无穷,( (1+tanx) /(1+sinx) ) ^(1/x^3) )
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求极限lim(x->无穷,( (1+tanx) /(1+sinx) ) ^(1/x^3) )
求极限lim(x->无穷,( (1+tanx) /(1+sinx) ) ^(1/x^3) )
求极限lim(x->无穷,( (1+tanx) /(1+sinx) ) ^(1/x^3) )
等价小替换:x→0,ln(1+x) ~ x,1-cosx ~ x²/2