Page 24 - Practicum 5_Buku Digital Flip pdf_Grace Margareth_Arithmetic Sequence and Series Grade XI

Mathematics Teaching Material Sequence and Series Grade XI

D. Summary

Material Videos

1. Arithmetic Sequence

An arithmetic sequence is a sequence of numbers in which the difference between two
consecutive terms is the same or constant. The difference between two consecutive terms is

called the difference (b).

So the formula for the nth term of an arithmetic sequence is

Information : = nth term

= Order of Tribes

= First Tribe

= Difference or difference between tribes

2. Arithmetic Series

An arithmetic series is the sum of the numbers in a known arithmetic sequence.If the arithmetic
sequence isU , U , , … ,U U then the arithmetic series is …, and is denoted by .U + U +
3 n
2
1
2
1
U + +U
3
n
The general formula for determining the sum of the first n terms of an arithmetic series is:
n
n
S = [2a + (n − 1)b] orS = [a + U ]
n
n
n
2
2
Information : = Series/Number of arithmetic sequences

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