运用泰勒级数,把cosx和ln(1+x^2)展开
lim((-cosx+1-ln(1+x^2)^1/2)/x^4)
=lim[(-1+x^2/2-x^4/24+o(x^5)+1 -1/2(x^2-x^4/2+o(x^5)]/x^4
=5/24
lim((sinx-ln(1+x^2)^1/2)/x^4) x->0求解 呵呵~
lim((sinx-ln(1+x^2)^1/2)/x^4) x->0求解 呵呵~
sin改成-cosx+1
sin改成-cosx+1
数学人气:358 ℃时间:2020-05-22 01:41:58
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