Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 10 - Systems of Equations and Inequalities - Section 10.6 Systems of Nonlinear Equations - 10.6 Assess Your Understanding - Page 795: 52

Answer

$(\frac{1}{2},\frac{1}{16})$

Work Step by Step

1. Take the difference between the two equations, we have $log_x(2y)-log_x(4y)=1$ or $log_x(\frac{2y}{4y})=1$ or $log_x(\frac{1}{2})=1$, thus $x=\frac{1}{2}$ 2. Use the 1st equation to get: $2y=(\frac{1}{2})^3$, thus $y=(\frac{1}{2})^4=\frac{1}{16}$ 3. Check the solution $(\frac{1}{2},\frac{1}{16})$, it fits the original equations.
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