(2m-n)x-m-5n>0
(2m-n)>m+5n
解集为x<10/7
则:2m-n<0
(m+5n)/(2m-n)=10/7
20m-10n=7m+35n
13m=45n
n/m=13/45
m<0;n<0
mx>n
x
(2m-n)x-m-5n>0的解集为x<10/7
则2m-n<0,
(m+5n)/(2m-n)=10/7
7(m+5n)=10(2m-n)
7m+35n=20m-10n,
13m=45n.n=13m/45,n/m=13/45
因为2m-n<0,则
2m-26m/45<0,
m<0
mx>n,
x
x>45/13