Series and Sequences

What is the sum of the first 50 terms of the series 2 + 17 + 32 + 47 + ...?

• 1,600

• 18,235

• 18,475

• 19,125

Find the first 6 terms of the sequence

• 1, 2, 6, 18, 54, 162

• 2, 6, 18, 54, 162, 486

• -2, -6, -18, -54, -162, -486

• -2, 1, 4, 7, 10, 13

Find the sum of the arithmetic series using a formula. The first 42 terms of the series whose terms are a_n=10-5n

• -4090

• -3895

• -4095

What is the 8th term in the sequence below?
3, 9, 27, 81, ...

• 19,683

• 6,561

• 2,187

• 729

Use the formula S_n to find the sum of the first five terms of the geometric sequence.

• 22

• 2/3

• 18

• 21

What is the sum of the first ten terms of the sequence 4, -12, 36, -108 . . . ?

• 59,050

• -59,048

• -78,732

• 118,096

Find the 7th term in the sequence of 6, 13, 20...

• 48

• 46

• 42

• 36

The third term of a geometric sequence is 96 and the fifth term is 1536.  What is the sum of the first ten terms of the sequence?

• 4,092

• 1,572,864

• 2,097,150

• 33,554,400

What kind of sequence is illustrated below?
 400, 200, 100, 50, 25, ...

• Arithmetic

• Geometric

• Neither

What is the common ratio for the sequence:
28, 14, 7, 3.5...

• 2

• 1/2

• -14

• -7