# Math Help - How to solve for the minimum of this quadratic function

1. ## Re: How to solve for the minimum of this quadratic function

fee2998f0bf25e4d24dbedcea88080b8.gif

Here I have graphed y and y'
y'=0 where x=4.139 (to 3decimal places)

so there is a local minimum at x=4.139
If the domain was restricted to $(0,\infty]$ (I think that is how you write it, please correct me if i am wrong)
then this would be the minimum.

2. ## Re: How to solve for the minimum of this quadratic function

Originally Posted by Melody2
fee2998f0bf25e4d24dbedcea88080b8.gif
If the domain was restricted to $(0,\infty]$ (I think that is how you write it, please correct me if i am wrong)
then this would be the minimum.
(0, $\infty$)

we don't want to allow zero since there would be a 4/0 term and that's not defined.

$\infty$ always gets a )

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