∫ dx x^2 /( 1+x^2)
u = x dv =x /(1+x^2)
so
∫ dx x^2 /( 1+x^2) = x log(1+x^2) -∫ dx log(1+x^2) ...stop
I also tried
u = x^2 dv = 1 /(1+x^2)
so
∫ dx x^2 /( 1+x^2) = x^2 atan(x) -∫ dx 2x atan(x) ...stop
I would like to know the step by step solution of this integral:
∫ dx x^2 /( 1+x^2)
I tried to solve it integrating by parts with u = x dv =x /(1+x^2) , or with hyperbolic functions, but I always get stuck...
Thank you
Hello,
I have to create the CMB multipole map from a Planck Data Map with Healpix routines on IDL, and I just don't got a clue of how it must be done!
Can anybody help me?Thanks!
physfed