m+2n分之2m-n的绝对值=3,求m+2n分之2(2m-n)-m+2n分之2m-n-3的值

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/24 04:06:35
m+2n分之2m-n的绝对值=3,求m+2n分之2(2m-n)-m+2n分之2m-n-3的值m+2n分之2m-n的绝对值=3,求m+2n分之2(2m-n)-m+2n分之2m-n-3的值m+2n分之2m

m+2n分之2m-n的绝对值=3,求m+2n分之2(2m-n)-m+2n分之2m-n-3的值
m+2n分之2m-n的绝对值=3,求m+2n分之2(2m-n)-m+2n分之2m-n-3的值

m+2n分之2m-n的绝对值=3,求m+2n分之2(2m-n)-m+2n分之2m-n-3的值
∣(2m-n)/(m+2n)∣=3
(2m-n)/(m+2n)=±3
当(2m-n)/(m+2n)=3时
∣2(2m-n)/(m+2n)∣-(2m-n)/(m+2n)-3
=2∣(2m-n)/(m+2n)∣-(2m-n)/(m+2n)-3
=2*3-3-3
=0
当(2m-n)/(m+2n)=-3时
∣2(2m-n)/(m+2n)∣-(2m-n)/(m+2n)-3
=2∣(2m-n)/(m+2n)∣-(2m-n)/(m+2n)-3
=2*3-(-3)-3
=6+3-3
=6