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If the line y =x+k  touches the hyperbola 9x^2 -16y^2 =144, then k = - Mathematics and Statistics

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MCQ

If the line y =x+k  touches the hyperbola 9x2 -16y2 =144, then k = _________

Options

  • 7

  • -7

  • `+-sqrt7`

  • `+-sqrt19`

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Solution

C)`+-sqrt7`

Concept: Conics - Tangents and normals - equations of tangent and normal at a point
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