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3- In an arithmetic sequence, as = 6 and a14 = 42. Find an explicit formula for the nth term of this sequence.

3- In an arithmetic sequence, as = 6 and a14 = 42. Find an explicit formula for the nth term of this sequence.

College Algebra
College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.3: Geometric Sequences And Series
Problem 4ECP: Find a formula for the nth term of the geometric sequence 4, 20, 100, . . . .What is the 12th term...
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3- In an arithmetic sequence, as = 6 and a14 = 42. Find an explicit formula for the nth term of this sequence. 4- Say whether each given sequence is a geometric sequence, or not. Find the common ratio and the 10th term for each one. a) 2, 5, 12.5, 31.25, 78.125, ... c) 5, 1.5, 0.45, 0.135, ... e) 6, 14, 20, 28, 34, ... b) 2, 3, 4.5, 6.75, 10.125, ... d) 0.1, 0.2, 0.4, 0.8, 1.6, 3.2, ... f) -1, 3, -9, 27, -81, ...
Transcribed Image Text:3- In an arithmetic sequence, as = 6 and a14 = 42. Find an explicit formula for the nth term of this sequence. 4- Say whether each given sequence is a geometric sequence, or not. Find the common ratio and the 10th term for each one. a) 2, 5, 12.5, 31.25, 78.125, ... c) 5, 1.5, 0.45, 0.135, ... e) 6, 14, 20, 28, 34, ... b) 2, 3, 4.5, 6.75, 10.125, ... d) 0.1, 0.2, 0.4, 0.8, 1.6, 3.2, ... f) -1, 3, -9, 27, -81, ...
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