Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 11 - Section 11.2 - Finding Limits Using Properties of Limits - Exercise Set - Page 1153: 21

Answer

$2$

Work Step by Step

Recall that if $ f $ is a polynomial function, then we have $\lim_\limits{x\to a}f(x)=f(a)$. In order to to find the limit, we will plug $ a $ into the function and then simplify. $\lim_\limits{x\to 1} \dfrac{x^2-1}{x-1}=\dfrac{\lim_\limits{x\to 1} (x-1)(x+1)}{\lim_\limits{x\to 1} x-1}=\lim_\limits{x\to 1} x+1=2$
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