Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 7 - Exponential and Logarithmic Functions - 7-3 Logarithmic Functions as Inverses - Practice and Problem-Solving Exercises - Page 458: 82

Answer

$3$

Work Step by Step

Recall (1) $\log_a{b}=y \longleftrightarrow a^y=b$ (2) The value of the function $f(x)=\log_a{x}$ increases as $x$ increases. Let $y=\log_{\sqrt7}{\sqrt{50}}$ Use the definition in (1) above to obtain: $y=\log_{\sqrt7}{\sqrt{50}}\longrightarrow (\sqrt7)^y=\sqrt{50}$ Note that $(\sqrt7)^2=7$ while $(\sqrt7)^3=7\sqrt7$ Since $7 \lt \sqrt{50} \lt 7\sqrt7$, then $y$ must be between $2$ and $3$. Thus, the least integer that is greater than $\log_{\sqrt7}{\sqrt{50}}$ is $3$.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.