xy-3/2y-1/2)-(xy-3/2x+1)
=xy-3/2y-1/2-xy+3/2x-1
=-3/2y-1/2+3/2x-1
=3/2(x-y)-3/2
=3/2*2/3-3/2
=-1/2
.求下列式的值:(xy-3/2y-1/2)-(xy-3/2x+1),其中x=10/3,y=8/3
.求下列式的值:(xy-3/2y-1/2)-(xy-3/2x+1),其中x=10/3,y=8/3
数学人气:819 ℃时间:2020-03-29 18:42:09
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