- #1
QuarkCharmer
- 1,051
- 3
Homework Statement
[tex]\int ln(2x+1)dx[/tex]
Homework Equations
The Attempt at a Solution
[tex]\int ln(2x+1)dx[/tex]
[itex]u = ln(2x+1)[/itex]
[itex]du = \frac{2}{2x+1}[/itex]
[itex]v = x[/itex]
[itex]dv = dx[/itex]
[tex]\int ln(2x+1)dx = xln(2x+1)-2\int \frac{x}{2x+1}dx[/tex]
And there is where I am stuck. I can't use trig substitution either. I don't know how to integrate x/(2x+1). I tried successive integrations by part, they didn't work. I tried u-substitution, no luck. Wolfram alpha wasn't any help in solving this either. I know there must be a way for my to solve it using only substitution and integration by part. Can someone just point me in the right direction please?