Can you do 11 please? Thanks

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter8: Polynomials
Section8.4: Zeros Of A Polynomial
Problem 19E
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Can you do 11 please? Thanks

11 Define f: R → R by f(x) = 8x if x is rational and f(x) = 2x² + 8 if x is irrational. Prove
from the definition of continuity that f is continuous at 2 and discontinuous at 1.
3.2 ALGEBRA OF CONTINUOUS FUNCTIONS
*12. Let p and q be polynomials and xo be a zero of q of multiplicity m. Prove that plq can be
assigned a value at xo such that the function thus defined will be continuous there iff xo is a
Transcribed Image Text:11 Define f: R → R by f(x) = 8x if x is rational and f(x) = 2x² + 8 if x is irrational. Prove from the definition of continuity that f is continuous at 2 and discontinuous at 1. 3.2 ALGEBRA OF CONTINUOUS FUNCTIONS *12. Let p and q be polynomials and xo be a zero of q of multiplicity m. Prove that plq can be assigned a value at xo such that the function thus defined will be continuous there iff xo is a
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