An arithmetic sequence has first term a and common difference d. It is given that the sum of the first four terms is more than the sum of the next four terms by 8. Also, the first term, third and sixth term of the sequence are three consecutive terms of a geometric progression. Find the exact values of a and d.
An arithmetic sequence has first term a and common difference d. It is given that the sum of the first four terms is more than the sum of the next four terms by 8. Also, the first term, third and sixth term of the sequence are three consecutive terms of a geometric progression. Find the exact values of a and d.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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An arithmetic sequence has first term a and common difference d. It is given that the sum of the first four terms is more than the sum of the next four terms by 8. Also, the first term, third and sixth term of the sequence are three consecutive terms of a geometric progression. Find the exact values of a and d.
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