设z=xcosy-2yex+2x，则分别为( )。A.C.os

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问题设z=xcosy-2yex+2x，则

分别为( )。A.C.osy+2yex+2xln2，xsiny-exB.C.osy-2yex-2xln2，xsiny+2exC.C.osy-2yex+2xln2，-xsiny-2exD.siny-2yex+2xln2，C.osy-2ex

选项 A.C.osy+2yex+2xln2，xsiny-ex
B.C.osy-2yex-2xln2，xsiny+2ex
C.C.osy-2yex+2xln2，-xsiny-2ex
D.siny-2yex+2xln2，C.osy-2ex

答案 C

解析利用偏导公式即可得解

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