# Math Help - inequality

1. ## inequality

The joint solution of inequality $\log_\pi (x+1)+\log_\pi x<\log_\pi (2x+6)$ is?

$\{x \in IR;0

2. Originally Posted by boy47
The joint solution of inequality $\log_\pi (x+1)+\log_\pi x<\log_\pi (2x+6)$ is?

$\{x \in IR;0
Using the usual log rule and a bit of re-arranging you should get $x^2 - x - 6 < 0$ which has the solution $-2 < x < 3$.
But $\log_{\pi} x$ is only defined for x > 0.