Can we have an adverb Max so that f Max y finds the maximum of f on the
list y ?
Sent from my iPad
On Feb 23, 2013, at 12:03 PM, Aai <agroeneveld...@gmail.com> wrote:
> With some math in J
>
> x : length barn side
> -->the other rectangle side is then
> -: 100 - x
>
> i.o.w. we have
> A = x (50 - x/2)
>
> with J
>
> 0 1 +//.@(*/) 50 _0.5
> 0 50 _0.5
>
> first derivative
>
> 0 50 _0.5&p. d. 1
> 50 _1&p.
>
> second derivative
>
> 0 50 _0.5&p. d. 2
> _1"0
>
> --> a maximum for
>
> 1{:: p. 50 _1
> 50
>
> --> maximum (rectangular) area
>
> 0 50 _0.5&p. 50
> 1250
>
>
>
>
>
> On 23-02-13 15:42, km wrote:
>> Use J to solve the farmer's fence problem:
>>
>> A farmer with 100 meters of wire fence wants to make a rectangular chicken
>> yard using an existing barn wall for one of the north-south sides. What is
>> the largest area he can enclose if he uses the 100 meters of fence for the
>> other three sides, and what are the dimensions of the largest-area chicken
>> yard?
>>
>> Kip Murray
>>
>> Sent from my iPad
>>
>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
>
> --
> Met vriendelijke groet,
> @@i = Arie Groeneveld
>
> ----------------------------------------------------------------------
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