- #1
member 428835
Homework Statement
Simplify $$\int_{-1}^1\left( (1-x^2)P_i''-2xP'_i+2P_i\right)P_j\,dx$$
where ##P_i## is the ##i^{th}## Legendre Polynomial, a function of ##x##.
Homework Equations
The Attempt at a Solution
Integration by parts is likely useful?? Also I know the Legendre Polynomials are orthogonal on ##[-1,1]##. Before simply trying integration by parts term-wise I was trying to see if the equi-dimensional equation ##(1-x^2)P_i''-2xP'_i+2P_i## could first be expressed in a more simple manner? Any thoughts?