z=sin(x,y)求Z在(1,1)点对X的偏导数
人气:308 ℃ 时间:2020-06-19 22:08:42
解答
sin(x,当做sin(x×y)做吧!
Z′x=ycos(xy).Z′x|(1,1)=cosi
Z′y=xycos(xy).Z′y|(1,1)=cosi
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