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Defining a function in Mathematica

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  1. May 4, 2014 #1
    Hello,

    I know that in Mathematica one can define a function as follows:

    f[x_]:=x^2.

    The problem is, I get a polynomial from a for loop as an expression p=a*x^n+b*x^(n-1)+.... Now I want to evaluate the polynomial at a specific point. I tried to define a function from the polynomial as follows:

    f[x_]:=p

    and to evaluate

    f[2]

    which gives me just the polynomial, not it's value at 2.

    How can I evaluate this?

    Sincerely,
    Nikola
     
  2. jcsd
  3. May 4, 2014 #2
    I have already found out:

    f = Function[k, p /. x -> k]

    :D
     
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