发布网友 发布时间:2024-12-20 17:46
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热心网友 时间:2024-12-20 20:47
sin2x除以sin5x(x趋近于0)的极限要过程:
解:这是基本极限公式的应用,即:
lim(x→0)sin2x/sin5x
=lim(x→0)2x*(sin2x/2x)/[5x*(sin5x/5x]
=2/5*lim(x→0)(sin2x/2x)/(sin5x/5x)
=2/5*lim(x→0)(sin2x/2x)/lim(x→0)(sin5x/5x)
=2/5*1/1
=2/5.