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Question

The ratio of the sum and product of the roots of the equation 7x2-12x+18=0
(a) 7 : 12
(b) 7 : 18
(c) 2 : 3
(d) 3 : 2


Solution

(c) 2 : 3

Given:7x2  12x + 18 = 0 α + β = 127 and αβ = 187, where α and β are the roots of the equation Ratio of the sum and product of the roots = 127 : 187= 12 : 18= 2  : 3

Mathematics
RS Aggarwal (2015)
Standard X

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