Let origin be the centre, ± 3 , 0 be the foci and 3 2 be the eccentricity of a hyperbola. Then the line…

Let origin be the centre, ±3,0 be the foci and 32 be the eccentricity of a hyperbola. Then the line 2x-y-1=0
  1. intersects the hyperbola at two points
  2. does not intersect the hyperbola
  3. touches the hyperbola
  4. passes through the vertex of the hyperbola

Solution

Given,

Origin be the centre, ±3,0 be the foci and 32 be the eccentricity of a hyperbola,

Now we know that foci is ±ae,0±3,0,

So ae=3 and given e=32 then a=12,

Now by formula b2=a2e2-1 we get b=54

So, equation of hyperbola will be x214-y2516=1

20x2-y2=80

Now putting the value of y from the line 2x-y-1=0 in hyperbola to check intersecting or not,

So, 20x2-2x-12=80

16x2+4x-81=0

Now discriminant D=42+4×16×81>0, hence line does not intersect the hyperbola.

Asked in: AP EAMCET 2022 (04 Jul Shift 1)

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