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Question

The asymptotes of a hyperbola having centre at the point (3,2) are parallel to the lines x3y=0 and 2xy=0. If the hyperbola passes through the point (1,3), Find the equation of the hyperbola.

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Solution

Let the asymptotes be x3y+c1=0 and 2xy+c2=0
Since, the asymptotes passes through the centre (3,2) of the hyperbola.
,36+c1=0 and 62+c2=0
c1=9,c2=8
Thus, the equations of the asymptotes are
x3y+9=0 and 2xy+8=0
Let the equation of the hyperbola be
(x3y+9)(2xy+8)+λ=0 ........(1)
It passes through (1,3).
,(1+9+9)(2+3+8)+λ=0
19×13+λ=0
247+λ=0
λ=247
Putting the value of λ in (1), we obtain
(x3y+9)(2xy+8)247=0
This is the equation of the required hyperbola.

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