219k views
25 votes
3. What are the first three terms of the Arithmetic Sequence a, = 12 - 2(n - 1)?

11, 10,9
1,2,3
12,10,8
0 10 20​

User Dtroy
by
9.1k points

1 Answer

4 votes

Answer:

12, 10, 8

Explanation:

Substitute n = 1, n = 2 and n = 3 to find the 1st, 2nd and 3rd terms of the sequence:


a_n=12-2(n-1)


\implies a_1=12-2(1-1)=12-2+2=12\\\\ \implies a_2=12-2(2-1)=12-4+2=10\\\\ \implies a_3=12-2(3-1)=12-6+2=8

User Lasonya
by
8.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories