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Homework Help: Set theory - set builder notation

  1. Aug 19, 2010 #1
    1. The problem statement, all variables and given/known data
    X={8^n-7n-1/n belongs to N}
    Y={49(x-1)/x belongs to N}

    2. Relevant equations
    x is subset of y ] or y is subset of x
    or x=y,none of these
  2. jcsd
  3. Aug 19, 2010 #2


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    Science Advisor

    Re: set,logic,

    You have now posted 3 different, but similar, problems with no sign of any attempt to solve them on your part. You can't learn mathematics that way! Are you able to list some numbers that are in sets X and Y.

    (By the way, in mathematics, "x" and "y" may be quite different from "X" and "Y". Don't use small letters and Capital letters interchangabley.)
  4. Aug 21, 2010 #3
    Re: set,logic,

    niraj, could you please show what approach you are going to take to solve it?

    I'm assuming you don't have to proof any of those claims. Hence, you can start by doing some examples. I think you will realize this problem is much easier than you think!
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