Arithmetic sequences [Arithmetic Progression or Arithmetic Sequence], with the acronym. A.P. or A.S.The arithmetic sequence is a sequence in which definitions of variance together [the Common difference d abbreviation] between terms, with an expression that an a + 1. There is a constant for every n. It is d = an + 1-an. General format of a sequence is a1, a1 + arithmetic d, 2d, ..., a1 + a1 + (n-1), a d. .. An expression that is n = a1 + (n-1) d.Example 1 determine the sequence of the arithmetic expression is 7 and has a 1st differences become 5 a8 and a12 find.How to do because that a1 = 7 and d = 5. Therefore, a8 = a1 + 7d = 7 + 7 = 42 (5). a12 = a1+ 11d = 7 + 11(5) = 62Example 2 find the right at 10 and 15 terms of arithmetic sequences, 4, 9, 14, 19, ...How to make a proposition from the a1 = 4. d = 9 - 4 = 5 a10 = a1 + 9d = 4 + 9(5) = 49 a15 = a1 + 14d = 4 + 14(5) = 74
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