# Quick ? : Identifying function from series

• December 10th 2008, 04:24 AM
pi_cubed
Quick ? : Identifying function from series
Hello! Does anyone know offhand the function that the Maclaurin series given by [(-1)^n * x^(2n) / (n+1)], n=0..., represents? Thanks!!
• December 10th 2008, 04:32 AM
Mathstud28
Quote:

Originally Posted by pi_cubed
Hello! Does anyone know offhand the function that the Maclaurin series given by [(-1)^n * x^(2n) / (n+1)], n=0..., represents? Thanks!!

Yeah, try looking at $\frac{\ln\left(1+x^2\right)}{x^2}$