(a) If n and r are positive integers with n r, how many solutions are there...
Question:
x1 + x2 + ... + xr = n
where each xt is a positive integer, for 1 ≤ i ≤ r?
(b) In how many ways can a positive integer n be written as a sum of r positive integer summands (1 ≤ r ≤ n) if the order of the summands is relevant?
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a The number of positive integer solutions to the ...View the full answer
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Related Book For
Discrete and Combinatorial Mathematics An Applied Introduction
ISBN: 978-0201726343
5th edition
Authors: Ralph P. Grimaldi
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