Chapter 12: Q9-4P (page 562)
Expand the following functions in Legendre series.
Short Answer

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Chapter 12: Q9-4P (page 562)
Expand the following functions in Legendre series.

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To sketch the graph of for x from 0 to .
Solve the differential equations in Problems 5 to 10 by the Frobenius method; observe that you get only one solution. (Note, also, that the two values of are equal or differ by an integer, and in the latter case the larger gives the one solution.) Show that the conditions of Fuchs's theorem are satisfied. Knowing that the second solution is X times the solution you have, plus another Frobenius series, find the second solution.
From (17.4), show that, .
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
Prove that the functions are orthogonal onwith respect to the weight function
Hint: Write the differential equationas, and see Sectionsand .
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