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MHT CET202016 Oct 2020Evening ShiftMathematicsParabolaActual

The length of latus -rectum of the parabola x²+2 y=8 x-7 is

Options

  1. A8
  2. B2
  3. C6
  4. D4

Correct answer

B. 2

Step-by-step solution

We have, array l x²+2 y=8 x-7 x²-8 x=-2 y-7 x²-8 x+16=-2 y-7+16 (x-4)²=-2 y+9 (x-4)²=-2(y-9 / 2) array Length of latus rectum =2

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