# Thread: Help solving this integral

1. ## Help solving this integral

I tried substituting u=2x in and solving it , but it didnt work. Can someone please help me get started?
Thanks

2. ## Re: Help solving this integral

show what you did so maybe someone can see why "it didn't work" ...

3. ## Re: Help solving this integral

If you changed the base from 13 to e, would that help?

4. ## Re: Help solving this integral

Originally Posted by nubshat

I tried substituting u=2x in and solving it , but it didnt work. Can someone please help me get started?
Thanks
Hint: $(13^2)^x=169^x$
I gues now you know who's the "u".

5. ## Re: Help solving this integral

use the substitution y = 169^x
ln y = x ln 169
(1/y) dy/dx = ln 169
dx = (1/ln 169) (dy/y)

Now integrate. Hope this helps.