I have a rectangle inscribed in the parabola defined by

with one edge on the x-axis ?

Would I assume that edge on the x-axis is x or 2x?

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- May 3rd 2009, 11:48 AMsk8erboyla2004Rectangle Inscribed in an Area
I have a rectangle inscribed in the parabola defined by

with one edge on the x-axis ?

Would I assume that edge on the x-axis is x or 2x? - May 3rd 2009, 11:51 AMderfleurer
Your width is 2x, your height is y.

- May 3rd 2009, 11:57 AMsk8erboyla2004
So area = b*h

and differentiate

Solve for 0

which one I use? positive or negative - May 3rd 2009, 12:02 PMderfleurer
So i'm guessing you're trying to maximize your area?

Seeing as we can't have negative dimensions, we use +. - May 3rd 2009, 12:07 PMsk8erboyla2004
Thanks man it just seems I keep getting all sorts of things confused (Headbang)

I get the dimsenions are

- May 3rd 2009, 12:17 PMderfleurer

Looks good to me. Just remember, technically, our base is 2x, not x.