Let xeyz+yexz+xyz=0 . If Z is a function of x and y, then zy(x,y,z) is
A) −xy(eyz−exz+1) xzeyz+exz+xz B) xy(eyz+exz−1) xzeyz+exz+xz C) −xy(eyz+exz−1) xzeyz+exz+xz D) xy(eyz+exz+1) xzeyz+exz+xz E) −xy(eyz+exz+1) xzeyz+exz+xz
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