The formula for calculating the sum of all natural integers from 1 to n is well-known: n² Sn =1+2+3+... +n = 2 %3D Similary, we know about the formula for calculating the sum of the first n squares: n3 Qn = 1.1+2-2+3-3+... +n·n = 3 n2 Now, we reduce one of the two multipliers of each product by one to get the following sum: Mn = 0 1+1 -2+2.3+3-4+ ... + (n – 1) -n Find an explicit formula for calculating the sum Mn.
The formula for calculating the sum of all natural integers from 1 to n is well-known: n² Sn =1+2+3+... +n = 2 %3D Similary, we know about the formula for calculating the sum of the first n squares: n3 Qn = 1.1+2-2+3-3+... +n·n = 3 n2 Now, we reduce one of the two multipliers of each product by one to get the following sum: Mn = 0 1+1 -2+2.3+3-4+ ... + (n – 1) -n Find an explicit formula for calculating the sum Mn.
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
Chapter2: Working With Real Numbers
Section2.3: Rules For Addition
Problem 7P
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