y=2xsin(2x+5)求导数y'=(2x)'sin(2x+5)+(2x)[sin(2x+5)]'=2sin(2x+5)+2xcos(2x+5)可答案是2sin(2x+5)+4xcos(2x+5)哪里错了
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![y=2xsin(2x+5)求导数y'=(2x)'sin(2x+5)+(2x)[sin(2x+5)]'=2sin(2x+5)+2xcos(2x+5)可答案是2sin(2x+5)+4xcos(2x+5)哪里错了](/uploads/image/z/2625680-56-0.jpg?t=y%3D2xsin%282x%2B5%29%E6%B1%82%E5%AF%BC%E6%95%B0y%27%3D%282x%29%27sin%282x%EF%BC%8B5%29%EF%BC%8B%282x%29%5Bsin%282x%EF%BC%8B5%29%5D%27%3D2sin%282x%EF%BC%8B5%29%EF%BC%8B2xcos%282x%EF%BC%8B5%29%E5%8F%AF%E7%AD%94%E6%A1%88%E6%98%AF2sin%282x%EF%BC%8B5%29%EF%BC%8B4xcos%282x%EF%BC%8B5%29%E5%93%AA%E9%87%8C%E9%94%99%E4%BA%86)
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y=2xsin(2x+5)求导数y'=(2x)'sin(2x+5)+(2x)[sin(2x+5)]'=2sin(2x+5)+2xcos(2x+5)可答案是2sin(2x+5)+4xcos(2x+5)哪里错了
y=2xsin(2x+5)求导数
y'=(2x)'sin(2x+5)+(2x)[sin(2x+5)]'
=2sin(2x+5)+2xcos(2x+5)
可答案是2sin(2x+5)+4xcos(2x+5)
哪里错了
y=2xsin(2x+5)求导数y'=(2x)'sin(2x+5)+(2x)[sin(2x+5)]'=2sin(2x+5)+2xcos(2x+5)可答案是2sin(2x+5)+4xcos(2x+5)哪里错了
解析
y'=(2x')sin(2x+5)+2xsin(2x+5)'
=2sin(2x+5)+2x*2*cos(2x+5)
=2sin(2x+5)+4xcos(2x+5)
因为你没有对2x+5求导
它是复合的
6
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