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Is this a rational function?

  1. Dec 7, 2011 #1
    y=(5x^4 + 5^x -1)/(2x^3 +1)

    More specifically is 5^x a valid term in a polynomial?
  2. jcsd
  3. Dec 7, 2011 #2


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    It is not.

    A rational function is defined as the quotient of two polynomials functions. Like you said, 5x is not a valid term of a polynomial.
  4. Dec 11, 2011 #3
    ...and gb7nash answered him. Is this really something to nitpick about?
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