Chapter 12: Q9-1P (page 562)
Expand the following functions in the Legendre series.
Short Answer

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Chapter 12: Q9-1P (page 562)
Expand the following functions in the Legendre series.

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Prove as follows:
Write Bessel's equation (12.1) with and with ; multiply the equation by and the equation by and subtract to get . Then . To find , use equation for each of the four functions and pick out the terms in the products.
Expand the following functions in Legendre series.
Verify the recursion relationsas follows:
a) DifferentiateWith respect toto get equate coefficients ofrole="math" localid="1654857725406"
b) Differentiate with respect to to get equate coefficients of
c) Combine (a) and (b) to get . Substitute the series for and equate coefficients of
Verify by direct substitution that the text solution of equation (16.3) and your solutions in the problems above are correct. Also prove in general that the solution (16.2) given for (16.1) is correct. Hint: These are exercises in partial differentiation. To verify the solution (16.4) of (16.3), we would change variables from x,y to say z, u where , and show that if x,y satisfy then u , z satisfy, .
To calculate the given system of equation.
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