Hello I am having trouble with this question.

INtegrate:

f(2x+5)/(x+4) dx

My attempt:

1/2x+5f 1/x+4 dx

2x+5 Ln (x+4) + c

Printable View

- May 21st 2010, 01:12 AMAwsom GuyIntegration using logs
Hello I am having trouble with this question.

INtegrate:

f(2x+5)/(x+4) dx

My attempt:

1/2x+5f 1/x+4 dx

2x+5 Ln (x+4) + c - May 21st 2010, 02:53 AMgalactus

You're close. But there should be a minus where the plus is, and a 3 instead of a 5 in front of the ln. - May 21st 2010, 03:08 AMAwsom Guy
But how do you get the -3. That is the part I cannot do.

By the way thanks for the help and nice avatar thing. - May 21st 2010, 03:19 AMgalactus
If we expand, we get

Now, integrate that and you can see why. - May 21st 2010, 03:48 AMArchie Meade
Alternatively,