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solve kar ke dekha
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f(x) = x^2- 2kx + k^2 + k - 5 since roots r real => 20 - 4k >= 0 =>k<= 5 ------------------------------------------------1 also f(5)>0 => k^2 - 9k + 20 > 0 => k<4 & k> 5 --------------------------------------2 from 1 & 2 k < 4 |
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