Answer
a) $f(4)=81$
The point is (4,81).
b)$x=-2$
The point is (-2, 1/9).
Work Step by Step
a) $f(4)=3^4=81$
The point is (4,81).
b) $\dfrac{1}{9}=3^x$
$\dfrac{1}{3^2}=3^x$
$3^{-2}=3^x$
$x=-2$
The point is (-2, 1/9).
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 6 - Section 6.3 - Exponential Functions - 6.3 Assess Your Understanding - Page 436: 96
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