/*! 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} 50 Find each sum鈭憂=190(3-2n)... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 12: 50 (page 816)

Find each sum

鈭�n=190(3-2n)

Short Answer

Expert verified

The solution isS90=7920

Step by step solution

01

Given information

鈭�n=190(3-2n)鈭�n=190(3-2n)

02

Calculation

We have, 鈭�n=190(3-2n)鈭�n=190(3-2n)

The series goes localid="1649315475013" 1,-1,-3,...,-177

So, localid="1649315481474" a1=1,d=-2,an=-177

Now use formula,

an=a1+(n-1)d鈬�-177=1+(n-1)(-2)鈬�-177=1-2n+2鈬�-2n=-180鈬�n=1802=90

To find sum localid="1649315562990" S90

S90=902[1+(-177)]=-7920

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 Problems 11鈥�16, evaluate each factorial expression.

3!7!4!

In Problems 71-82, find the sum of each sequence.

鈭�k3k=520

In Problems 71-82, find the sum of each sequence.

鈭�(k2k=014-4)

In Problems 17鈥�28, write down the first five terms of each sequence.

bn=nen

In Problems 37鈥�50, a sequence is defined recursively. Write down the first five terms.

a1=A;an=an-1+d
See all solutions

Recommended explanations on Math Textbooks

Discrete Mathematics

Read Explanation

Decision Maths

Read Explanation

Calculus

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Pure Maths

Read Explanation

Statistics

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.