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lim(x→0)ln(1-2x)/x
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lim(x→0)(cosx)^(1/ln(1+x^2))
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lim(x→0)(ln(1+x^2)/(sec-cosx))
lim x→0[ln(cosx)]/x^2
高数,泰勒公式lim [x-x^2ln(1+1\x)]x→∞
lim(x→0)(x^2+cosx-2)/(x^3)*ln(1+x)怎么算