If the function f(x)=2 x^ 2 -k x+5 is increasing on [1, 2], then k lies in the interval.
Mathematics · JEE Main · NTA Exams — Limit, Continuity and Differentiability
If the function \(f(x)=2 x^{2}-k x+5\) is increasing on [1, 2], then k lies in the interval.
- (-∞, 4)
- (4, ∞)
- (-∞, 8)
- (8, ∞)
Answer
(B) (4, ∞)
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