Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 2 - Section 2.1 - Introduction to Functions - Exercise Set - Page 113: 37


$$f(2) = 2(2) +1$$ $$f(2) = 5$$

Work Step by Step

The notation $f(x)$ does not mean $“f\:times\:x.”$ The notation describes the value of the function at $x$. For example, consider the function $f(x) = 2x +1$. When evaluating at $x=2$, this means that the value $2$ must be substituted to all $x$ in the given function. Thus, $$f(2) = 2(2) +1$$ $$f(2) = 5$$
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