Let \(\alpha, \beta\) be the roots of \(x^2 - x + p = 0\) and \(\gamma, \delta\) be the roots of \(x^2 - 4x + q = 0\) where p and q are integers. If \(\alpha, \beta, \gamma, \delta\) are in…
Question and options
Let be the roots of and be the roots of where p and q are integers. If are in geometric progression then is
- -34
- 30
- 26
- -38
Answer and explanation
Correct answer: A - -34
Let terms be t, tr, tr^2, tr^3: t(1+r) = 1 and tr^2(1+r) = 4 so r = +-2. r = 2 gives p = 2/9 (not integer); r = -2 gives t = -1, p = t^2 r = -2, q = t^2 r^5 = -32, p+q = -34.
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IPMAT Indore
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