Chapter 12: Q9P (page 584)
Use problem 7 to show that
Plm (x) = (-1)m (l+m)!/(l-m)! (1-x2)/2l! dl-m/dxl-m(x2-1)l
Short Answer
The answer is stated below.
Chapter 12: Q9P (page 584)
Use problem 7 to show that
Plm (x) = (-1)m (l+m)!/(l-m)! (1-x2)/2l! dl-m/dxl-m(x2-1)l
The answer is stated below.
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Get started for freeTo study the approximations in the table, a computer plot on the same axes the given function together with its small x approximation and its asymptotic approximation. Use an interval large enough to show the asymptotic approximation agreeing with the function for large x. If the small x approximation is not clear, plot it alone with the function over a small interval
Expand the following functions in Legendre series.
Expand the following functions in Legendre series.
Hint: Solve the recursion relation (5.8e)for Pl(x)and show that ∫a1 Pl(x) dx=1/2l+1 [Pl-1 (a)-Pl+1 (a)].
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.
To study the approximations in the table, a computer plot on the same axes the given function together with its small x approximation and its asymptotic approximation. Use an interval large enough to show the asymptotic approximation agrees with the function for large x . If the small x approximation is not clear, plot it alone with the function over a small interval .
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