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Question

If the roots of equation x2bxaxc=m1m+1 are equal but opposite in sign, the value of m will be



A

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B

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C

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D

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Solution

The correct option is D


Given equation can be written as

(m + 1)x2 – {m(a + b) – (a – b)}x + c(m – 1) = 0

Roots are equal and of opposite sign.

So sum of roots is equal to zero.

0=m(a+b)(ab)m=aba+b


Mathematics

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