Page 17 - Practicum 5_Buku Digital Flip pdf_Grace Margareth_Arithmetic Sequence and Series Grade XI
P. 17
Mathematics Teaching Material Sequence and Series Grade XI
The difference between two consecutive terms is called the difference (b).
Formula : = −
1
2
= − b = − −
3
2
= −
4
3
Dst
If the first term = a and difference = b, then in general the arithmetic sequence is:
3
2
1
4
, + + 2 , + 3 , …… + ( − 1)
Formula for Determining the nth Term of an Arithmetic Sequence:
= + ( − 1)
Description : = Value of term
= Order of term
= First term
= Difference or difference between term
If the number of terms (n) is odd, the middle term ( )The arithmetic sequence can be
formulated as follows.
1 1
= ( + ) = ( + 1)
2 2
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