x@y=xy+[y-5]那么[-2]@3=?
问题描述:
x@y=xy+[y-5]那么[-2]@3=?
答
[-2]@3
=(-2)*3+[3-5]
=-6+(-2)
=-8
x@y=xy+[y-5]那么[-2]@3=?
[-2]@3
=(-2)*3+[3-5]
=-6+(-2)
=-8