Summands question
Number Theory
Level
3
In how many ways can you write 6 as an ordered summand of more than one element? [For example, 3 can be written as 1+2, 2+1, 1+1+1]
29
33
27
31
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1 solution
By stars and bars, we know that the answer is ∑ n = 1 ∞ ( k 5 ) = 3 1