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Homework Help: X,Y are polynomials of n, and n is an element of N, then

  1. Aug 19, 2010 #1
    1. The problem statement, all variables and given/known data

    X={4^n-3n-1/ n belongs to N}
    Y={9(n-1)/ n belongs to N }

    2. Relevant equations
    then,
    XUY is equals to X or Y or N or None of these
     
  2. jcsd
  3. Aug 19, 2010 #2

    HallsofIvy

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    Science Advisor

    Re: set,logic,

    First, list some of the members of X and Y.

    But does "4^n-3n-1/ n" mean
    4^(n- 3n- 1/n)

    or 4^(n- 3n- 1)/n

    or ((4^n)- 3n- 1)/n

    or 4^n- 3n- (1/n)?

    Please be precise.
     
    Last edited by a moderator: Aug 21, 2010
  4. Aug 20, 2010 #3
    Re: set,logic,

    Exactly. List the members of X and Y. Also, try and visualize the equations mentally as what they are describing in words. Apne aap kuchh samajh main aa jayega!

    Phir, come back and post here
     
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