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已知lim(h趋向0)sinh/h=1求lim(h趋向0)sin3h/h=提示k=3h
题目详情
已知lim(h趋向0)sinh/h=1 求lim(h趋向0)sin3h/h= 提示k=3h
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答案和解析
lim(h趋向0)sin(3h)/h=3lim(h趋向0)sin(3h)/(3h)=3lim(k=3h趋向0)sin(k)/k=3*1=3
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