help help help. Determine the extrema of f(x)= (-4)* x/ x^2+7 below on the given interval
(a) on [1,4]
The minimum is ?? and the maximum is ??
(b) on [1,5]
The minimum is ?? and the maximum is ??

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do we use the quadratic formula for this one?

did you find the derivative?

derivative is 1*x^2+7-2x*(-4)*x/ (x^2+7)^2

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