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18 February, 09:34

Which hyperbola has both vertices in the same quadrant?

O A. (1 + 10) (y - 3) 2

112 - 102

B. (y - 3) 2 (1 + 6) 2

92122

OC. (1 - 1) 2 (y - 11) 2

12282

+1
Answers (1)
  1. 18 February, 09:36
    0
    Given a hyperbola with an equation:

    Foci will have coordinates:

    F₁ (xc - c, yc) and F₂ (xc - c, yc)

    where c = √ (a² + b²)

    While given a hyperbola with an equation:

    Foci will have coordinates:

    F₁ (xc, yc - c) and F₂ (xc, yc - c)

    where c = √ (b² + a²)

    Now, start looking at the equations you are given as a solution and note the option A and C do not represent a hyperbola since they don't have both parenthesis squared.

    For option B) you have:

    xc = 24

    yc = 1

    a² = 24² = 576

    b² = 7² = 49

    Therefore:

    c = √ (576+49) = √625 = 25

    and

    F₁ (-1, 1) F₂ (49, 1)

    which are not on the same quadrant.

    For option D) you have:

    yc = 16

    xc = - 1

    a² = 9² = 81

    b² = 12² = 144

    Therefore:

    c = √ (144+81) = √225 = 15

    and

    F₁ (-1, 1) F₂ (-1, 31)

    which are on the same quadrant.

    Hence, the correct answer is b i think
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