11
QuizMultiple Choice

Conic Sections — Test

Question 11 • Geometry

What are the foci of the hyperbola whose equation is the fraction with numerator open paren y minus 2 close paren squared and denominator 64 minus the fraction with numerator open paren x minus 4 close paren squared and denominator 36 is equal to 1 ?

Answer
A
open paren negative 6 comma 2 close paren and open paren 14 comma 2 close paren
B
open paren 4 comma negative 8 close paren and open paren 4 comma 12 close paren
C
open paren negative 4 comma 2 close paren and open paren 12 comma 2 close paren
D
open paren 4 comma negative 6 close paren and open paren 4 comma 10 close paren

Explanation

The equation is in the form of a vertical hyperbola centered at (4, 2), with a² = 64 and b² = 36. For a hyperbola, c² = a² + b², so c² = 100 and c = 10. The foci are 10 units above and below the center: (4, 12) and (4, −8), which is choice D.

AI-written and checked against the verified answer.

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