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If both the roots of the quadratic equation x^2 – 2kx + k^2 + k – 5 = 0 are less than 5, then k lies in the interval

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If both the roots of the quadratic equation x2 – 2kx + k2 + k – 5 = 0 are less than 5, then k lies in the interval

(a) (6, ∞) 

(b) (5, 6]

(c) [4, 5] 

(d) (– ∞, 4).

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