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The equation of common tangent to the curves y^2 = 16x and xy = –4, is :

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The equation of common tangent to the curves y2 = 16x and xy = –4, is :

(1)  x – y + 4 = 0

(2)  x + y + 4 = 0

(3)   x – 2y + 16 = 0

(4)  2x – y + 2 = 0 

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Correct option  (1) x – y + 4 = 0

Explanation:

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