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Number of posts : 2
Age : 25
Location : Dallas,TX
Registration date : 2008-08-13

Combinatorics Empty
PostSubject: Combinatorics   Combinatorics EmptySun Sep 07, 2008 11:02 am

How many of the first 100 positive integers are expressible as a sum of three or fewer members of the set
{3^0, 3^1, 3^2, 3^3, 3^4} if we are allowed to use the same power more than once. For example, 5 can be represented, but 8 cannot.

1994 UNC Charlotte Comprehensive Exam
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