Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 10 - Section 10.4 - Nonlinear Inequalities and Systems of Inequalities - Exercise Set - Page 628: 36

Answer

Please see the graph.

Work Step by Step

The green line is the graph $x^{2}-y^{2}\ge1$ and has a dotted line since it has a less than sign. The blue line is the graph $\frac{x^{2}}{16}+\frac{y^{2}}{4}\le1$ and has a solid line since it has a less than or equal to sign. The orange line is the graph $y\ge1$ and has a solid line since it has a greater than or equal to sign. We also pick the point $(0,2)$ to determine what sides of the graphs to shade. For the green graph, we need three points to determine what sides to shade since it is a hyperbola. We pick $(-2,0)$, $(0,0)$, and $(2,0)$. $(-2,0)$ $ x^{2}-y^{2}\ge1$ $(-2)^{2}-0^{2}\ge1$ $4-0 \ge 1$ $4 \ge 1$ (true, so we shade the side of the graph with the point) $(0,0)$ $ x^{2}-y^{2}\ge1$ $0^{2}-0^{2}\ge1$ $0-0 \ge 1$ $0 \ge 1$ (false, so we shade the side of the graph without the point) $(2,0)$ $ x^{2}-y^{2}\ge1$ $(2)^{2}-0^{2}\ge1$ $4-0 \ge 1$ $4 \ge 1$ (true, so we shade the side of the graph with the point) $(0,2)$ $\frac{x^{2}}{16}+\frac{y^{2}}{4}\le1$ $\frac{0^{2}}{16}+\frac{2^{2}}{4}\le1$ $0/16 + 4/4 \le 1$ $1 \le 1$ (true, so we shade the side of the graph with the point) $(0,2)$ $y\ge1$ $2\ge1$ $2 \ge 1$ (true, so we shade the side of the graph with the point) The overlap of the graphs is the solution set.
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