SOLUTION: f(x)= 2x^2 + x - 1 determine If 'f' has a maximum or minimum value The value of x at wich the maximum or minimum value occurs The max. Or min. Value of the function 'f'

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Question 654439: f(x)= 2x^2 + x - 1 determine
If 'f' has a maximum or minimum value
The value of x at wich the maximum or minimum value occurs
The max. Or min. Value of the function 'f'

Answer by htmentor(1343) About Me  (Show Source):
You can put this solution on YOUR website!
The function has a minimum value, since the coefficient of the quadratic term is positive.
The function has a minimum where df/dx = 0 -> 4x + 1 = 0 -> x = -1/4
The minimum value is f(-1/4) = 2(-1/4)^2 - 1/4 - 1 = -9/8