# Math: Arithmetic Sequence.

the 3rd of an Arithmetic sequence is 8 of the 16th term is 47. Find a subed 1 and the common difference. Construct the sequence.

1. 0
2. 0
3. 12
asked by Jan
1. a3 and a16 are 13 terms apart. So,

13d = 47-8 = 39
d=3

a+2d=8, so a=2

Now you know a and d.

1. 0
2. 0
posted by Steve

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