Thomas Calculus 13th [Solutions]

Section 11.6 Conic Sections 841
25. Foci: 2, 0 , Vertices: ( 2, 0) a 2,
2
2 2
2 2 2
y
c 2 b a c 4 2 2 x 1
4 2
26. Foci: (0, 4), Vertices: (0, 5) a 5,
c
2
2 y
4 b 25 16 9 x 1
9 25
2
27.
2 2 2 2
x y 1 c a b 1 1 2;
asymptotes are y x
28.
2 2
2
x y
2 2
16 9
9x 16y 144 1 c a b
16 9 5; asymptotes are y
3
x
4
2
29.
2 2
2 2 y
2 2
8 x 1
8 8
y x c a b
8 8 4; asymptotes are y x
30.
2 2
2 2 y
2 2
4 x 1
4 4
y x c a b
4 4 2 2; asymptotes are y x
31.
2 2
2 y
2 2
8x 2y 16 x 1 c a b
2 8
2 8 10; asymptotes are y 2x
2
32.
2
2 2 y 2 2 2
3 3 1
3
y x x c a b
3 1 2; asymptotes are y 3x
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