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The least value of k for which the function x^2+kx+1 is an increasing function in the interval 1

7 years ago


Answers : (1)



f(x) = x2 + kx + 1

f'(x) = 2x + k >= 0 if f(x) is increasing


k>= -2x

Now x ε (1,2)


k>= -2



7 years ago

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