设z=xcosy-2yex+2x,则、分别为()。 A.cosy+2yex+2xln
题型:单项选择题
问题:
设z=xcosy-2yex+2x,则、分别为()。
A.cosy+2yex+2xln2,xsiny-ex
B.cosy-2yex-2xln2,xsiny+2ex
C.cosy-2yex+2xln2,-xsiny-2ex
D.siny-2yex+2xln2,cosy-2ex
设z=xcosy-2yex+2x,则、分别为()。
A.cosy+2yex+2xln2,xsiny-ex
B.cosy-2yex-2xln2,xsiny+2ex
C.cosy-2yex+2xln2,-xsiny-2ex
D.siny-2yex+2xln2,cosy-2ex