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If P(at^2, 2at) be one end of a focal chord of the parabola y^2 = 4ax, then the length of the chord is ..........

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If P(at2, 2at) be one end of a focal chord of the parabola y2 = 4ax, then the length of the chord is ..........

(a) a[t – (1/t)]

(b) a[t + (1/t)]

(c) a[t – (1/t)]2 

(d) a[t + (1/t)]2

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The correct option (d) a[t + (1/t)]2

Explanation:

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