lime^x-1 /2 x趋向于0,求极限,为什么最后能变成x/2x
人气：472 ℃ 时间：2020-06-20 05:11:49
解答
=lime^x-1 /2 x
=lim(e^0-1 /2 x)
=lim(1-1 /2 x)
=lim(2x/2 x-1 /2 x)
=lim(x/2x)
=1/2
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