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If the function f(x)=2x^2 -kx+5 is stric...

If the function `f(x)=2x^2 -kx+5` is strictly increasing in [1,2], then 'k' lies in the interval

A

`(-oo, oo)`

B

`(-oo, 4)`

C

`(4, oo)`

D

`(0, oo)`

Text Solution

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The correct Answer is:
B
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