Answers

2014-05-04T10:46:18+05:30
2014-05-04T10:51:08+05:30
Let x+y=1........(1)
kx+y=3..........(2)
x+ky=5..........(3)

adding 2 and 3 => (k+1)(x+y)=8
we want at least one solution. hence comparing with (1) we get k+1=8=>k=7.
0