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Homework Help: I need help with polynomials

  1. Feb 5, 2006 #1
    the directions are: determine whether each expression is a polynomial.:rolleyes:

    i got the easyones like: 12x3-2x2+0.5 is a polynomial

    but i cant figure these out:

    I dont know if the variables can be fractions but i think this could be this:
    1/11x3+1/8 x2 so i think it is a polynomial.:surprised


    im not sure if the variable can be the exponent

    please explain how it is or is not a polynomial. thank you:cry:
  2. jcsd
  3. Feb 5, 2006 #2
    Polynomials are functions that can be expressed as [itex]a+bx+cx^2+...+px^n[/itex] for real numbers a,b,c,...,p.
    Thus the one with fractions is a polynomial because those fractions are real numbers. The one with x in the exponent, though, can't be so written, so it's not a polynomial.
  4. Feb 5, 2006 #3
    THANKS DUDIE! I TOTALLY GET IT KNOW!:biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :biggrin: :!!)
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