已知函数f(x)=xlnx+2x,求y=f(x)的导数
人气：446 ℃ 时间：2019-09-24 05:53:37
解答
y'=(xlnx)'＋(2x)'
=(xlnx)'＋2
=(x)'lnx＋(x)(lnx)'＋2
=lnx＋1＋2
=lnx＋3
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