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Question

The roots of the equation ax2+bx+c=0 will be reciprocal of each other if
(a) a = b
(b) b= c
(c) c = a
(d) none of these

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Solution

(c) c = a
Let the roots of the equation (ax2 + bx + c = 0) be α and 1α. Product of the roots = α × 1α = 1 ca = 1 c = a

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