5. The first and 25th term of the sequence an = (-1)"-1(n – 1) are both positive. 5 6. The summation notation of the series 10 -5 +-- 4 is the summation of the geometric series E=1(a1 r"). Where a, = 10 andr = 7. The sequence described by the equation an = 2 + 3(n - 1) has its sum equal to En=1(3n – 1). %3D1 | 8. Every sequence is either defined by an explicit formula or a recursive formula but not both. _9. A triangular number 1, 3, 6, 10,... is a sequence which is described n(n+1) by Tn = 2 10. The Fibonacci number is a sequence which is described explicitly by E. = F 1 + En

5. The first and 25th term of the sequence an = (-1)"-1(n – 1) are both positive. 5 6. The summation notation of the series 10 -5 +-- 4 is the summation of the geometric series E=1(a1 r"). Where a, = 10 andr = 7. The sequence described by the equation an = 2 + 3(n - 1) has its sum equal to En=1(3n – 1). %3D1 | 8. Every sequence is either defined by an explicit formula or a recursive formula but not both. _9. A triangular number 1, 3, 6, 10,... is a sequence which is described n(n+1) by Tn = 2 10. The Fibonacci number is a sequence which is described explicitly by E. = F 1 + En

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter9: Sequences, Probability And Counting Theory

Section: Chapter Questions

Problem 25RE: Use the formula for the sum of the first nterms of a geometric series to find S9 , for the series...

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