Problem #7: Consider the differential equation2x²y" + (x² + x)y′ − y = 0.(a) Without solving this differential equation, one can say that any power series solution centered at the ordinary3 (i.e. a series involving powers of x − 3) has a radius of convergence at least equal to R. What isR? (Enter infinity if R = ∞.)point xo=(b) Find the two roots of the indicial equation associated with the regular singular point xoanswers with a comma.n=0(c) If r₁ denotes the largest of the 2 roots of the indicial equation, the differential equation above has a solution ofthe formwhereCn=Cnxn+r1=0. Separate yourg(n)cn-1, n ≥ 1,for a certain function g(n). Compute g(n).(d) Write the sum of the first 3 non-zero terms of the series in (c) if co= 1.(e) What is the radius of convergence of the series in (c) if co = 1? (Enter infinity if it is infinite.)

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Problem #7: Consider the differential equation 2x²y" + (x² + x)y' - y = 0. (a) Without solving this differential equation, one can say that any power series solution centered at the ordinary point xo = 3 (i.e. a series involving powers of x − 3) has a radius of convergence at least equal to R. What is R? (Enter infinity if R = ∞.) (b) Find the two roots of the indicial equation associated with the regular singular point xo = 0. Separate your answers with a comma. (c) If r₁ denotes the largest of the 2 roots of the indicial equation, the differential equation above has a solution of the form ∞ Σ cnxntr n=0 where Cn = g(n)cn-1, n ≥ 1, for a certain function g(n). Compute g(n). (d) Write the sum of the first 3 non-zero terms of the series in (c) if co = 1.

Problem #7: Consider the differential equation 2x²y" + (x² + x)y' - y = 0. (a) Without solving this differential equation, one can say that any power series solution centered at the ordinary point xo = 3 (i.e. a series involving powers of x − 3) has a radius of convergence at least equal to R. What is R? (Enter infinity if R = ∞.) (b) Find the two roots of the indicial equation associated with the regular singular point xo = 0. Separate your answers with a comma. (c) If r₁ denotes the largest of the 2 roots of the indicial equation, the differential equation above has a solution of the form ∞ Σ cnxntr n=0 where Cn = g(n)cn-1, n ≥ 1, for a certain function g(n). Compute g(n). (d) Write the sum of the first 3 non-zero terms of the series in (c) if co = 1.

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Question

Problem #7: Consider the differential equation
2x²y" + (x² + x)y′ − y = 0.
(a) Without solving this differential equation, one can say that any power series solution centered at the ordinary
3 (i.e. a series involving powers of x − 3) has a radius of convergence at least equal to R. What is
R? (Enter infinity if R = ∞.)
point xo
=
(b) Find the two roots of the indicial equation associated with the regular singular point xo
answers with a comma.
n=0
(c) If r₁ denotes the largest of the 2 roots of the indicial equation, the differential equation above has a solution of
the form
where
Cn
=
Cnxn+r1
=
0. Separate your
g(n)cn-1, n ≥ 1,
for a certain function g(n). Compute g(n).
(d) Write the sum of the first 3 non-zero terms of the series in (c) if co
= 1.
(e) What is the radius of convergence of the series in (c) if co = 1? (Enter infinity if it is infinite.)

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