NCERT Class XI Mathematics - Conic Sections - Solutions
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Question : 51
Total: 71
Solution:
Given equation of hyperbola is 16 x 2 – 9 y 2 = 576
i.e.,
−
= 1 ⇒
−
= 1 which is of the form
−
= 1.
The foci and vertices of the hyperbola lie on x-axis.
Now,a 2 = 36 ⇒ a = 6 and b 2 = 64 ⇒ b = 8
Also,c 2 = a 2 + b 2 = 36 + 64 = 100 ⇒ c = 10
∴ Coordinates of foci are (± c, 0) i.e, (±10, 0)
∴ Coordinates of vertices are (± a, 0) i.e. (± 6, 0)
Eccentricity (e) =
=
=
Length of latus rectum =
=
=
.
i.e.,
The foci and vertices of the hyperbola lie on x-axis.
Now,
Also,
∴ Coordinates of foci are (± c, 0) i.e, (±10, 0)
∴ Coordinates of vertices are (± a, 0) i.e. (± 6, 0)
Eccentricity (e) =
Length of latus rectum =
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