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

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mshe1riVirJAshkaaah mshe1riVirJAshkaaah

04-06-2016
Mathematics

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

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AL2006 AL2006 · Answer 1 · 2016-06-04T17:57:10+02:00

AL2006 AL2006

04-06-2016

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 .

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