f(x)=(1-cos2x)/x 求导数f'(0)=?f(x)=(1-cos2x)/x 求导数f'(0)=?答案给的是f'(0)=2

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f(x)=(1-cos2x)/x 求导数f'(0)=?f(x)=(1-cos2x)/x 求导数f'(0)=?答案给的是f'(0)=2
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f(x)=(1-cos2x)/x 求导数f'(0)=?f(x)=(1-cos2x)/x 求导数f'(0)=?答案给的是f'(0)=2
f(x)=(1-cos2x)/x 求导数f'(0)=?
f(x)=(1-cos2x)/x 求导数f'(0)=?
答案给的是f'(0)=2

f(x)=(1-cos2x)/x 求导数f'(0)=?f(x)=(1-cos2x)/x 求导数f'(0)=?答案给的是f'(0)=2
f'(x)=[2xsin2x-(1-cos2x) ]/x²
因为分母为x,当x=0时,没有意义
所以
导数不存在.