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If b^2 = ac, equation ax^2 + 2bx + c = 0 and dx^2 + 2ex + f = 0 have common roots then d/a , e/b , f/c are in _______

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If b2 = ac, equation ax2 + 2bx + c = 0 and dx2 + 2ex + f = 0 have common roots then d/a , e/b , f/c are in _______ 

(a) A. P. 

(b) G. P. 

(c) H. P. 

(d) None of these

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The correct option (a) A. P

Explanation:

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