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Irving.Zhu
02/22/09 8:27pm

Hi All,

Here is the situation.

I have a function say:

f[x_] = x^3 + x^2 + x + 1

Taking the derivative D[f[x], x],

I get 1 + x + x^2 + x^3.

My question is how do I programtically define function g[x_]:=1 + x + x^2 + x^3?

Defining g[x_] := D[f[x], x] is probably not the right way to go, as every time I evaluate g[x], it will compute D[f[x],x].

I want the result of D[f[x],x] memorized and defined as g[x]. In other words, I want g[x]:=1 + x + x^2 + x^3. Is there any way to do this?

Thanks,
Irving Zhu

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Subject (listing for 'How can I define a function as the results of D...')
Author Date Posted
How can I define a function as the results of D... Irving.Zhu 02/22/09 8:27pm
Re: How can I define a function as the results ... yehuda ben-s... 02/24/09 08:11am
Re: How can I define a function as the results ... Xavier 02/24/09 09:30am
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