Explanation Given: It is given that the 11th term is 1 − 28 and the ratio is − 1 3 . Approach: The general formula for n t h term of any geometric sequence is given by, a n = a 1 r n − 1 Where, a 1 is the first term of the sequence and r is the ratio and n are a natural number. Calculation: Consider the provided information, The 11th term is 1 − 28 and the ratio is − 1 3 . Now, in order to find the first term of the sequence use the formula a n = a 1 r n − 1 and Substitute 11 for n and 1 − 28 for a n and − 1 3 for r in the above formula. Thus, 1 − 28 = a 1 ( − 1 3 ) 11 − 1 Or

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ISBN: 9780135960363

Author: BILLSTEIN

Publisher: PEARSON

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Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence. It was invented by German mathematician Carl Friedrich Gauss.

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Chapter 8.1A, Problem 14A

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The first term in a geometric sequence if the 11th term is 1−28 and the ratio is −13.

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Chapter 8.1A, Problem 13A

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The first term in a geometric sequence if the 11th term is 1 − 28 and the ratio is − 1 3 .

Solution Summary: The author explains how to find the first term in a geometric sequence if the 11th term is -128 and the ratio is

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The first term in a geometric sequence if the 11th term is 1−28 and the ratio is −13.

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Chapter 8 Solutions

The first term in a geometric sequence if the 11th term is 1 − 28 and the ratio is − 1 3 .

Solution Summary: The author explains how to find the first term in a geometric sequence if the 11th term is -128 and the ratio is

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To find: The first term in a geometric sequence if the 11th term is 1−28 and the ratio is −13.

Want to see the full answer?

Chapter 8 Solutions

To find:

The first term in a geometric sequence if the 11th term is 1−28 and the ratio is −13.