lim(x趋向0)x乘以cot2x 用洛必达法则求极限

2025-02-27 01:09:31
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回答1:

x乘以cot2x=x乘以cos2x除以sin2x
分子分母分别求导
lim(x趋向0)x (cos2x-2xsin2x)除以(2cos2x)
=(1-0)/(2)=1/2