(":") n +2 1(n – 0) + 2(n – 1) + 3(n – 2) + 4(n – 3) + ... + (n – 1)2+ (n – 0)1 =

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter6: Fractions
Section6.1: Simplifying Fractions
Problem 38WE
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Please use the hint.

Prove this by using combinatorial proof.

 

Hint: Consider thinking about subsets of the set {1, 2, 3, 4, . . . , n−1, n, n+1, n+2};
pick the middle number in each possible subset.

 

-(":")
n+2`
1(п — 0) + 2(п — 1) + 3(п - 2) + 4(п - 3) + ..- + (п - 1)2 + (п - 0)1 %3D
Transcribed Image Text:-(":") n+2` 1(п — 0) + 2(п — 1) + 3(п - 2) + 4(п - 3) + ..- + (п - 1)2 + (п - 0)1 %3D
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