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J
JBlackhole16-Pearl
16-Pearl
October 31, 2021
Solved

Built a polynome with just the coefficients in mathcad 15?

  • October 31, 2021
  • 3 replies
  • 3388 views

To all,

 

Note a mathematical question per say but one about “shortand” with Mathcad 15.

Is there a way of defining the coefficient of a polynome (say as a vector) and tell Mathcad that I want a full polynome like this: P(x)=a0+a1x+a2*x^2 + …. + an*x^n   (= SUM (an*x^n))

I can see the factor and expand commands but cannot find anything that does what I want/looking for.

 

Thanks

Best answer by Fred_Kohlhepp

If you want to use it as an operating (calculating) function, then you've already written it:

Fred_Kohlhepp_0-1635682885733.png

If you want it displayed as a full-length expression, I doubt it.

3 replies

V
VladimirN24-Ruby III
24-Ruby III
October 31, 2021

Here's a tip:

 

Pic-1.png

 

F
Fred_Kohlhepp23-Emerald IAnswer
23-Emerald I
October 31, 2021

If you want to use it as an operating (calculating) function, then you've already written it:

Fred_Kohlhepp_0-1635682885733.png

If you want it displayed as a full-length expression, I doubt it.

    J
    JBlackhole16-PearlAuthor
    16-Pearl
    October 31, 2021

    thanks. It was just in case there is a "obvious" predefined function. Something like p(x)=polynome(a,x)

    I found something in my library of useful functions but the sum will have to do

     

    Thanks to both

      W
      Werner_E25-Diamond I
      25-Diamond I
      October 31, 2021

      You may also consider writing a small utility function which turns a vector into a polynomial function.

      The example below also shows that the names of formal and actual argument must not be the same.

      Of course I would not use a confusing naming like the one shown in a real world worksheet.

      Werner_E_1-1635684441228.png

      MC15 file attached

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