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If f(x) = x^(2) + kx + 1 is increasing ...

If `f(x) = x^(2) + kx + 1` is increasing function in the interval [ 1, 2], then least value of k is –

A

2

B

4

C

-2

D

-4

Text Solution

Verified by Experts

The correct Answer is:
C
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