The set of values of 'a' for which the function f(x)=x^ 2 +a x+1 is an increasing…
Mathematics · JEE Main · NTA Exams — Limit, Continuity and Differentiability
The set of values of 'a' for which the function \(f(x)=x^{2}+a x+1\) is an increasing function on \([1,2]\) are :
- \((-2, \infty)\)
- \([-4, \infty)\)
- \((-\infty,-2)\)
- \((-\infty, 2]\)
Answer
(B) [-4, )
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