SOLUTION: write the explicit form for the following sequences: 1. 9, 16, 23,30..... 2. 1, 3, 6, 8, 11.... 3. 68, 57, 46, 35....

Question 934800: write the explicit form for the following sequences:
1. 9, 16, 23,30.....
2. 1, 3, 6, 8, 11....
3. 68, 57, 46, 35....
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
# 1

We're adding 7 each time. So d = 7
The first term is 9, so
This is an arithmetic sequence

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# 2

I'm not sure what the rule is here. So repost this question separately so others may see it and help you out.

The rule may be: add 2, add 3, add 2, add 3, ...

but that rule may be wrong.

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# 3

We subtract 11 each time, so d = -11
First term:
This is an arithmetic sequence

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