Use arithmetic series formula to calculate: 15+10+5+0+(-5)+(-10)+(-15)+...+(-5m)

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section9.2: Arithmetic Sequences
Problem 69SE: Find the 11th term of the arithmetic sequence 3a2b,a+2b,-a+6b,.... .
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Use arithmetic series formula to calculate:

15+10+5+0+(-5)+(-10)+(-15)+...+(-5m)

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