Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 11 - Review - Exercises - Page 833: 34

Answer

(a) center $C(0, 3)$, vertices $V(0, 3\pm\sqrt 3)$, foci $F(0, 3\pm\sqrt {19})$, asymptotes $y=\pm\frac{\sqrt 3}{4} x+3$ (b) See graph.

Work Step by Step

(a) Step 1. Write the given equation as $\frac{(y-3)^2}{4}-\frac{(x)^2}{16}=1$ Step 2. Identify the center as $C(0, 3)$ Step 3. Identify $a=\sqrt 3, b=4, c=\sqrt {3+16}=\sqrt {19}$ Step 4. The original vertices are $(0, \pm\sqrt 3)$, vertices after the shift $V(0, 3\pm\sqrt 3)$ Step 5. Original foci $(0, \pm\sqrt {19})$, foci after shift $F(0, 3\pm\sqrt {19})$ Step 6. Original asymptotes $y=\pm\frac{\sqrt 3}{4} x$, new asymptotes $y=\pm\frac{\sqrt 3}{4} x+3$ (b) See graph.
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