设a-b=3c-b=1/3,则3(a-c)05+2(c-a)-5为
设a-b=3c-b=1/3,则3(a-c)05+2(c-a)-5为
日期:2022-03-20 05:40:31 人气:1
a-b-(c-b)=3-1/3
a-b-c+b=8/3
a-c=8/3
3(a-c)²+2(c-a)-5
=3x(8/3)²-2x8/3-5
=64/3-16/3-5
=11
a-b-c+b=8/3
a-c=8/3
3(a-c)²+2(c-a)-5
=3x(8/3)²-2x8/3-5
=64/3-16/3-5
=11