Let f(2) be a rational function of two polynomials P(2) and Q(2): lil Show that the only singularities of f(z) are removable singularities or poles. liil If P(z) and Q(z) are both analytic at zo, and Q(z) has a simple zero at zo, while P(zo) # 0, prove that P(zo) Res(f; z0) =

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter5: Systems Of Equations And Inequalities
Section5.3: Partial Fractions
Problem 2E
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(b) Let f(2) be a rational function of two polynomials P(2) and Q(2):
lil Show that the only singularities of f(z) are removable singularities or poles.
lii If P(z) and Q(z) are both analy tic at zo, and Q(z) has a simple zero at zo, while P(zo) # 0, prove that
P(zo)
Res(f; z0) =
(0z).O
Transcribed Image Text:(b) Let f(2) be a rational function of two polynomials P(2) and Q(2): lil Show that the only singularities of f(z) are removable singularities or poles. lii If P(z) and Q(z) are both analy tic at zo, and Q(z) has a simple zero at zo, while P(zo) # 0, prove that P(zo) Res(f; z0) = (0z).O
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