Finite Math and Applied Calculus (6th Edition)

Published by Brooks Cole
ISBN 10: 1133607705
ISBN 13: 978-1-13360-770-0

Chapter 9 - Section 9.2 - Exponential Functions and Models - Exercises - Page 642: 5

Answer

$\begin{array}{|c|r|r|r|r|r|r|r|} \hline x & -3 & -2 & -1 & 0 & 1 & 2 & 3 \\ \hline f(x) &1/4 & 1/2 & 1 & 2 & 4 & 8 & 16 \\ \hline \end{array}$ Technology formula:$\quad $2*(2^x)$ \quad$ or$ \quad $2*2^x

Work Step by Step

Technology formula:$\quad $2*(2^x)$ \quad$ or$ \quad $2*2^x. PEMDAS (acronym for order of operations) has exponents before multiplication, so the parentheses are not necessary, although they are not an error. $f(-3)=2(2^{-3})=\displaystyle \frac{2}{2^{3}}=\frac{2}{8}=\frac{1}{4}\qquad $tech: 2*2^(-3) $f(-2)=2(2^{-2})=\displaystyle \frac{2}{2^{2}}=\frac{2}{4}=\frac{1}{2}\qquad $tech: 2*2^(-2) $f(-1)=2(2^{-1})=\displaystyle \frac{2}{2^{1}}=\frac{2}{2}=1\qquad $tech: 2*2^(-1) $f(0)=2(2^{0})=2(1)=2\qquad $tech: 2*2^0 $f(1)=2(2^{1})=2(2)=4\qquad $tech: 2*2^1 $f(2)=2(2^{2})=2(2^{2})=8\qquad $tech: 2*2^2 $f(3)=2(2^{3})=2(2^{3})=16\qquad $tech: 2*2^3
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