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Question: Answered & Verified by Expert
If the equation of one asymptote of the hyperbola $14 x^2+38 x y+20 y^2+x-7 y-91=0$ is $7 x+5 y-3=0$, then the other asymptote is
MathematicsHyperbolaAP EAMCETAP EAMCET 2018 (24 Apr Shift 1)
Options:
  • A $2 x-4 y+1=0$
  • B $2 x+4 y+1=0$
  • C $2 x-4 y-1=0$
  • D $2 x+4 y-1=0$
Solution:
2124 Upvotes Verified Answer
The correct answer is: $2 x+4 y+1=0$
Given hyperbola,


On factorising $14 x^2+38 x y+20 y^2$, we get
$$
=(7 x+5 y)(2 x+4 y)
$$

One of the asymptote is $7 x+5 y-3=0$
Then, let other asymptote is $2 x+4 y+k=0$
So, on combining

On equating the coefficient of $x$ from Eqs. (i) and
(ii), we get
$$
7 k-6=1 \Rightarrow k=1
$$

So, other asymptote is, $2 x+4 y+1=0$.

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