[根号下(1-x^2)]-1的等价无穷小是多少 怎么算

2025-01-19 14:24:27
推荐回答(2个)
回答1:

(1+u)^λ-1~λu
本题中,
√(1-x^2)-1
=(1-x^2)^(1/2)-1
~1/2·(-x^2)
=-1/2·x^2

回答2: