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UPSC NDA I 2017 Mathematics Solved Paper

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Question : 34

Total: 120

If the difference between the roots of the equation x2+kx+1=0 is strictly less than √5 where |k|≥2 then k can be any element of the interval

(−3,−2]∪[2,3)
( - 3,3 )
[−3,−2]∪[2,3]
None of the above

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