Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 3 - Polynomial and Rational Functions - Chapter 3 Test Prep - Review Exercises - Page 399: 53

Answer

(a) domain $(-\infty,\infty)$ (b) range $(-\infty,\infty)$ (c) end behavior: rise to the right and fall to the left (see figure). (d) number of zeros: maximum $ 7$ (e) number of turning points: maximum $ 6$

Work Step by Step

Given the dominating term of a polynomial function as $10x^7$, we can conclude the following: (a) domain $(-\infty,\infty)$ no bound horizontally. (b) range $(-\infty,\infty)$ no bound vertically. (c) end behavior: $n=7, a_7=10\gt0$, rise to the right and fall to the left (see figure). (d) number of zeros: maximum $n=7$ (e) number of turning points: maximum $n-1=6$
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