5. Let f(2) = p(z)/q(z) be a rational function, where p(z) and q(z) are polynomials that are relatively prime (no common zeros). We define the degree of f(2) to be the larger of the degrees of p(z) and q(z). Denote the degree of f(z) by d. (a) Show that each value w € C, w + f(∞), is assumed d times by f(z) on C. (b) Show that f(2) attains each value w e C* d times on C (as always, counting multiplicity).

Linear Algebra: A Modern Introduction
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ISBN:9781285463247
Author:David Poole
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Chapter6: Vector Spaces
Section6.3: Change Of Basis
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5. Let f(z) = p(z)/q(z) be a rational function, where p(z) and q(z)
are polynomials that are relatively prime (no common zeros). We
define the degree of f(z) to be the larger of the degrees of p(z)
and q(z). Denote the degree of f(z) by d. (a) Show that each value
w e C, w + f(0), is assumed d times by f(z) on C. (b) Show that
f(z) attains each value w e C* d times on C* (as always, counting
multiplicity).
Transcribed Image Text:5. Let f(z) = p(z)/q(z) be a rational function, where p(z) and q(z) are polynomials that are relatively prime (no common zeros). We define the degree of f(z) to be the larger of the degrees of p(z) and q(z). Denote the degree of f(z) by d. (a) Show that each value w e C, w + f(0), is assumed d times by f(z) on C. (b) Show that f(z) attains each value w e C* d times on C* (as always, counting multiplicity).
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