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21 votes
21 votes
Which answer is the explicit rule for the sequence 11, 8.5, 6, 3.5, 1

Which answer is the explicit rule for the sequence 11, 8.5, 6, 3.5, 1-example-1
User Goonerify
by
2.7k points

2 Answers

18 votes
18 votes

Answer:


a_n=13.5-2.5n

Explanation:


11,\ 8.5,\ 6,\ 3.5,\ 1...


So\ d=8.5-11=b-8.5=3.5-6=1-3.5


=-2.5


And\ a_1=\parallel \left\{Anithmetic\ \left.\ sequence\right\}\right.


so\ a_n=a_1+d(n-1)

=11-2.5(n-1)

=13.5-2.5n


The\ answer:a_n=13.5-2.5n

I hope this helps you

:)

User Bugfreerammohan
by
2.6k points
7 votes
7 votes

I think it's an= 13.5 - 2.5n

User Sachin Midha
by
3.4k points