已知m-2n=-2,则4+2m-4n=(),5+2n-m=()
问题描述:
已知m-2n=-2,则4+2m-4n=(),5+2n-m=()
答
0 7
m-2n=-2
4+2m-4n=4+2(m-2n)=4+2*(-2)=0
5+2n-m=5-(m-2n)=5-(-2)=7
答
4+2m-4n=4+2(m-2n)=4+2*(-2)=0
5+2n-m=5-(m-2n)=5-(-2)=7
答
4+2m-4n=4+2(m-2n)=4+(-4)=0
5+2n-m=5+2=7
答
4+2m-4n=4+2(m-2n)=4+2*2=8
5+2n-m=5-(m-2n)=5-2=3