Q.

If the line x-1=0, is a directrix of the hyperbola kx2y2=6, then the hyperbola passes through the point

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a

(25, 6)

b

(5, 3)

c

(5, 2)

d

(25, 36)

answer is C.

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Detailed Solution

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Complete Solution:

The equation of the hyperbola is given by: kx2 - y2 = 6.

The directrix of a hyperbola is related to its geometry. The given directrix x - 1 = 0 means that the directrix is located at x = 1.

We are given that the point (√5, -2) lies on the hyperbola. Substitute this point into the equation to determine the value of k:

Substitute x = √5 and y = -2:

k(√5)2 - (-2)2 = 6

5k - 4 = 6

5k = 10

k = 2

Now that we have k = 2, substitute back into the hyperbola equation:

2x2 - y2 = 6

To verify, substitute the point (√5, -2) again:

2(√5)2 - (-2)2 = 6

2 × 5 - 4 = 6

10 - 4 = 6

6 = 6

Final Answer:

The hyperbola passes through the point (√5, -2).

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If the line x-1=0, is a directrix of the hyperbola kx2−y2=6, then the hyperbola passes through the point