1. Is the sequence 0.3, 1.2, 2.1, 3, ... arithmetic? If so find the common difference. 2. An arithmetic sequence has the first term a_{1} = -4 and com

Rivka Thorpe 2020-12-03 Answered
1. Is the sequence 0.3,1.2,2.1,3,... arithmetic? If so find the common difference.
2. An arithmetic sequence has the first term a1=4 and common difference d=43. What is the 6th term?
3. Write a recursive formula for the arithmetic sequence 2,72,5,132... and then find the 22nd term.
4. Write an explicit formula for the arithmetic sequence 15.6,15,14.4,13.8,... and then find the 32nd term.
5. Is the sequence 2,1,12,14,... geometric? If so find the common ratio. If not, explain why.
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Expert Answer

Bella
Answered 2020-12-04 Author has 81 answers
Step 1
Given:
a1=4
d=43
a6=?
Step 2
We know in A.P
tn=a+(n1)d
Where a is the first term, d the common difference
t6=4+(61)(43)
=4+(5)(43)
=4203
=12203
=323
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