# Integration Help (Introductory Calculus)

• Feb 16th 2010, 05:30 PM
appplejack
Integration Help (Introductory Calculus)
Hello all,
I'm in my first-year at a college.
I have a mid-term coming up and there's so much to cover.
I've been weak at math every since grade 12.
My question:

integrate (5e^2x/ 7e^2x + 4) dx
So far I've got

1. I let u=2x
du = 2 dx
du/2 = dx

2. 1/2 integral (5e^u/7e^u+4) du

I have no idea how to proceed from here.
Thanks
• Feb 16th 2010, 05:40 PM
pickslides
Your integral is $\displaystyle \int \frac{5e^{2x}}{7e^{2x+4}}~dx$ ??
• Feb 16th 2010, 05:40 PM
Reminisce
$\displaystyle \int \frac{5e^{2x}}{7e^{2x+4}}~dx$ ?
• Feb 16th 2010, 06:09 PM
appplejack
Yeah,Thanks
How do I write integral sign using the keyboard?
• Feb 16th 2010, 06:14 PM
pickslides
Quote:

Originally Posted by appplejack
Yeah,Thanks
How do I write integral sign using the keyboard?

click on the integral sign in my post, it will show you

$\displaystyle \int \frac{5e^{2x}}{7e^{2x+4}}~dx = \frac{5}{7}\int e^{2x-(2x+4)}~dx$