设y=sin(1+2x2),则yˊ=________.

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问题 设y=sin(1+2x2),则yˊ=________.

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答案4xcos(1+2x2

解析 y=sin(1+2x2),则yˊ=cos(1+2x2).4x=4xcos(1+2x2).
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