       Re: question

• To: mathgroup at smc.vnet.net
• Subject: [mg80184] Re: [mg80130] question
• From: DrMajorBob <drmajorbob at bigfoot.com>
• Date: Tue, 14 Aug 2007 07:08:36 -0400 (EDT)
• References: <15087956.1187036502843.JavaMail.root@m35>

```This is obviously homework.

Bobby

On Mon, 13 Aug 2007 03:35:22 -0500, Ivan Egorov <egorov at bgu.ac.il> wrote:

>
> Hello, I have 2 questions.
>
> I need to write a function maxima[lis_List] which, given a list of
> numbers,
> produces a list of those numbers greater than all those that precede
> them. For example maxima[{ 9, 2, 10, 3, 14, 9}] returns { 9, 10, 14}.
> You need to use recursion, pattern matching, Select and Join.
> I also need to write a function derivList[f, x, n_Integer] that returns
> the list
> of first n derivatives of themathematical function f (x ) , that is,
> { f ( x ) , f ' ( x ) , f ' ' ( x ) ,..., f n(x )} . Then, operate
> your derivList implementation on Exp[-x] Sin[x] to generate the list
> of derivatives up to the fifth one (that is, returning {f ( x)  ,
> f ' ( x ) ,..., f (5)  (x )}). Use Plot to plot the results for the
> range 0<=x<=10 . Use the PlotStyle option to generate a different color
> for each curve.
>
> I realy don't understand  what they want in second question.
>
>
> Thanks.
>
> I hope that now is readable.
>
>

--

DrMajorBob at bigfoot.com

```

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