# linearizing log equations

• Sep 13th 2011, 09:18 AM
Veronica1999
linearizing log equations
Could I get some help on the attached problem?
Thanks.

The attachment has my work on it.
• Sep 13th 2011, 09:30 AM
Siron
Re: linearizing log equations
The problem is in the beginning. Because if you take the logarithm of the two sides then the equation becomes:
$\log(y)=\log(5\cdot 2^x+8)$
But there's no rule for $\log(a+b)=...?$.
• Sep 13th 2011, 07:12 PM
Veronica1999
Re: linearizing log equations
Then how can the difficulty be avoided?