Arithmetic Sequences & Series
9
a₁ = 21, an = 61, Sn = 369 Determine the number of terms n in the arithmetic series.
8720
a₁ = 23, an = 413, n = 40 Evaluate the arithmetic series described.
5
a₁ = 28, an = 68, Sn = 240 Determine the number of terms n in the arithmetic series.
1725
a₁ = 14, an = 101, n = 30 Evaluate the arithmetic series described.
44th term
-31 is what term of the sequence: 98, 95, 92, 89...
-17, -20, -23, -26, -29
..., -14, ___ ,___ ,___ ,___ ,___ ,-32,... Find the missing term or terms in the arithmetic sequence.
-115, -215, -315
..., -15, ___ ,___ ,___ , -415,... Find the missing term or terms in the arithmetic sequence.
25th term
197 is what term of the sequence: 53, 59, 65, 71,...
225
Evaluate:
2515
Evaluate:
308
Evaluate:
160
Find the 52nd term of the sequence: 7, 10, 13, 16, ...
-476
Find the 81st term of the sequence: 4,-2, -8, -14,...
-7, 1, 9
Find the next three terms of the sequence: -39, -31, -23, -15,
-22, -26, -30
..., -18, ___ ,___ ,___ ,-34,... Find the missing term or terms in the arithmetic sequence.
28, 18, 8, -2, -12
..., 38, ___ ,___ ,___ ,___ ,___ ,-22,... Find the missing term or terms in the arithmetic sequence.
175
15, 25, 35, 45, 55 Evaluate the related series of the sequence.
702
18 + 24 + 30 + 36..., n = 13 Evaluate each arithmetic series described.
649
29+ 35+ 41+ 47..., n = 11 Evaluate each arithmetic series described.
333
33, 42, 51, 60, 69, 78 Evaluate the related series of the sequence.
-15, -95, -175
Find the next three terms of the sequence: 305, 225, 145, 65,