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Q.

A hyperbola passes through the point P( 2, 3) and has foci at ( ±2, 0) . Then the tangent to this hyperbola at P also passes through the point

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a

3, 2

b

22, 33

c

-2, -3

d

32, 23

answer is C.

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Detailed Solution

Given hyperbola x2a2-y2b2=1       and foci=(±2,0) ae=2   x2a2-y2a2(e2-1)=1 It passes through 2, 3 then 2a2-34-a2=1 a4-9a2+8=0 a2=1 (or) a2=8 a2=1 ( e>1) b2=3 Equation of tangent at P is 2x-y3=1 By verfication 3rd option 22, 33 lies on tangent

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