lim x趋近于0 1-根号1-x/x

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limx趋近于01-根号1-x/xlimx趋近于01-根号1-x/xlimx趋近于01-根号1-x/xx→0lim(1-√(1-x))/x=lim(1-√(1-x))(1+√(1-x))/x(1+√(

lim x趋近于0 1-根号1-x/x
lim x趋近于0 1-根号1-x/x

lim x趋近于0 1-根号1-x/x
x→0
lim (1-√(1-x))/x
=lim (1-√(1-x))(1+√(1-x)) / x(1+√(1-x))
=lim x / x(1+√(1-x))
=lim 1 / (1+√(1-x))
=1/(1+1)
=1/2
有不懂欢迎追问

x→0
lim (1-√(1-x))/x (0/0 型,上下求导)
=lim (-1/(2√(1-x)))/1
= lim -1/(2√(1-x))
=-1/2