Exercises
[09N] Let be given \(n,k\) natural with \(k≥ 1\). How many different choices of vectors \((j_ 1,\ldots j_ k)\) of natural numbers are there such that \(j_ 1+\cdots +j_ k=n\) ? How many different choices of vectors \((j_ 1,\ldots j_ k)\) of positive natural numbers are there such that \(j_ 1+\cdots +j_ k=n\) ?
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