inequality why is this wrong?
posted by landry on .
(x3)/(x+1) > 5
i solved and got x < 2
but this is not right once you plug it in. please help.

it should be x>3

Not so. If x=5/2, y=11/3 < 5
(x3)/(x+1) > 5
if x > 1,
x3 > 5(x+1)
x3 > 5x+5
8 > 4x
x < 2
but, we assumed x > 1, so that's a nogo
If x < 1,
x3 < 5(x+1)
x3 < 5x+5
8 < 4x
x > 2
So, we have 2 < x < 1 
opps sorry made some calculation mistakes....