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lim:x平方-1/sin(x-1),x趋于1
人气:468 ℃ 时间:2020-02-04 09:39:02
解答
lim{x->1}(x^2-1)/sin(x-1)
=lim{x->1}(x+1)*lim{x->1}(x-1)/sin(x-1)
=2*1
=2
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