11.2.3 (a) Derive Eq. (11.35) (1-x²) P(x) = (n+1)xPn(x) −(n+1) Pn+1(x). (b) Write out the relation of Eq. (11.35) to preceding equations in sym- bolic form analogous to the symbolic forms for Eqs. (11.31)-(11.34).

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