Use the approach in​ Gauss’s Problem to find the following sums of arithmetic sequences.   a. 1 + 2 +3 + 4 + ....+99   b. 1 + 3 + 5 + 7 + ....+101   c. 4 + 9+ 14 + 19 + ....+489   d. 685 + 678 + 671 + 664 + ....+6

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section9.1: Sequences And Their Notations
Problem 70SE: Calculate the first eight terms of the sequences an=(n+2)!(n1)! and bn=n3+3n32n , and then make a...
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Use the approach in​ Gauss’s Problem to find the following sums of arithmetic sequences.
 
a. 1 + 2 +3 + 4 + ....+99
 
b. 1 + 3 + 5 + 7 + ....+101
 
c. 4 + 9+ 14 + 19 + ....+489
 
d. 685 + 678 + 671 + 664 + ....+6
 
 
 
 
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