5. of an geometric series is lie sum terms is 112. Determine the first term of this series. 3 - 20 3 - 2 51 3*+1- 2- 6. Evaluate the infinite series +.... 52 54

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section: Chapter Questions
Problem 23RE: Use the formula for the sum of the first ii terms of an arithmetic series to find the sum of the...
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5. The sum of an infinite geometric series is 108, while the sum of the first 3
terms is 112. Determine the first term of this series.
3k+1 2k-1
54
34 - 20 3 - 2!
6. Evaluate the infinite series
5!
52
7. Let n 0.123 = 0.123123... be a nonterminating repeating decimal. Find
Transcribed Image Text:5. The sum of an infinite geometric series is 108, while the sum of the first 3 terms is 112. Determine the first term of this series. 3k+1 2k-1 54 34 - 20 3 - 2! 6. Evaluate the infinite series 5! 52 7. Let n 0.123 = 0.123123... be a nonterminating repeating decimal. Find
10. Given a and b, suppose that three numbers are inserted between them so
that the five numbers form a geometric sequence. If the product of the three
inserted numbers between a and b is 27, show that ab = 9.
11. For what values of n will the infinite series (2n – 1) + (2n – 1)° + ... +
(2n – 1)' +... have a finite value?
Precalculus, First Semester, SY 2020-2021
Page 5 of 13
Transcribed Image Text:10. Given a and b, suppose that three numbers are inserted between them so that the five numbers form a geometric sequence. If the product of the three inserted numbers between a and b is 27, show that ab = 9. 11. For what values of n will the infinite series (2n – 1) + (2n – 1)° + ... + (2n – 1)' +... have a finite value? Precalculus, First Semester, SY 2020-2021 Page 5 of 13
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