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Math Help - list the elements in set

  1. #1
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    list the elements in set

    Hey guys having problems with this one.
    If B = {2,3,5}, what is B^3 ?

    Im guessing there must be 3^3 = 27 elements which means 27 different combinations of these 3 numbers. But I dont see how there can be that many combinations! Any help much appreciated.
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  2. #2
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    Quote Originally Posted by jvignacio View Post
    Hey guys having problems with this one.
    If B = {2,3,5}, what is B^3 ?

    Im guessing there must be 3^3 = 27 elements which means 27 different combinations of these 3 numbers. But I dont see how there can be that many combinations! Any help much appreciated.
    If you list them all eg
    2,2,2
    2,2,3
    2,2,5
    2,3,2
    2,3,3
    2,3,5 etc you'll see there are 27.
    I don't think "combinations" is the right word here.
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  3. #3
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    Quote Originally Posted by Debsta View Post
    If you list them all eg
    2,2,2
    2,2,3
    2,2,5
    2,3,2
    2,3,3
    2,3,5 etc you'll see there are 27.
    I don't think "combinations" is the right word here.
    cheers mate. whats the right word?
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  4. #4
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    Quote Originally Posted by jvignacio View Post
    cheers mate. whats the right word?
    2,2,3, and 2,3,2 are the same combination (since order doesn't matter but in your case it does), but are different "permutations".
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