/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q 89. Find the twenty-first term of a ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 12: Q 89. (page 1184)

Find the twenty-first term of a sequence where the first term is three and the common difference is eight.

Short Answer

Expert verified

163

Step by step solution

01

Step 1. Given Information. 

The first term is three and the common difference is eight.

02

Step 2. Formula used. 

Write the formula of an arithmetic sequence.

an=a1+n鈭�1d

Where a1 is the first term and d is a common difference.

03

Step 3. Find the twenty-first term. 

Substitute 3 for the first term, 8 for d, and 21 for n in the above formula.

a21=3+21鈭�18=3+160=163

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

In the following exercises, write the first five terms of each geometric sequence with the given first term and common ratio.

a1=4andr=3

Write the first five terms of the sequence where the first term is 7 and the common ratio is r=-3.

Find the sum of the first 30 terms of the arithmetic sequence: 5, 9, 13, 17, 21, 鈥�.

In the following exercises, expand each binomial using Pascal's Triangle.

(x-y)5

Write the first five terms of the sequence whose general term isan=3n+4
See all solutions

Recommended explanations on Math Textbooks

Calculus

Read Explanation

Pure Maths

Read Explanation

Probability and Statistics

Read Explanation

Geometry

Read Explanation

Statistics

Read Explanation

Theoretical and Mathematical Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.