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Chapter 12: Q. 26 (page 816)

Find the indicated term in each arithmetic sequence.
80th term of5,0,-5,....

Short Answer

Expert verified

The solution is-390.

Step by step solution

01

Step 1. Given information 

Arithmetic sequence:5,0,-5,....

02

Step 2. Calculation 

The first term of the arithmetic sequence is a1=5, and the common difference isd=-5.

Now, the 80th term is -

an=a1+n-1d

role="math" localid="1648710826608" a80=5+80-1-5

=5+-395

=-390

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