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September 20, 2014

September 20, 2014

Posted by **yareli** on Saturday, November 30, 2013 at 2:54am.

- calculus (optimization) -
**Steve**, Saturday, November 30, 2013 at 6:20amxy=384

so, y = 384/x

f = 2x+3y = 2x + 1152/x

df/dx = 2 - 1152/x^2

min f is when df/dx=0, at x=24

So, the field is 24x16

f = 48+48=96

as usual in these problems, the fencing is divided equally among lengths and widths.

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