Simple Integral question (Exponents)

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    Exponents Integral
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Homework Statement


\int \frac{6^x+12^x}{2^x}dx

Homework Equations


\int a^udu= \frac{a^u}{ln a} +C


The Attempt at a Solution


I don't know where to begin, I tried using parts but gave up.
 
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Make your life simpler by getting rid of the denominator.

6^x = (2 * 3)^x = 2^x * 3^x. You can apply the same idea to 12^x.
 
I will immediately try that, thanks!
 
Wohoo! It worked!

You are awesome, thank you!
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...

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