What is the formula for the general term of the arithmetic sequence 1, 5, 9, 13, …?

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asked Jun 28, 2017 154k views

1 Answer

Djenny · Answer 1 · 2017-07-03T21:56:34+0000

The formula is

a(n) = a(n-1) + 4 .

But to completely describe the sequence you've given,
these specifications also need to be stated:

a(1) = 1
and
n > 1 .

What is the formula for the general term of the arithmetic sequence 1, 5, 9, 13, …?

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