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The equation of latus rectum of a parabola is x + y = 8 and the equation of the tangent at the vertex is x + y = 12 , then length of the latus rectum is

(a) 4

(b) 2

(c) 8 

(d) 82

1 Answer

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Best answer

Correct option  (d) 8√2

Explanation:

Length of latus rectum = 4a = 4x4/√2 = 8√2.

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