Sequences and Series Precalculus

Is the sequence 2, 4, 12, 48,... geometric?

• yes

• no

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

• 2

• 1/2

• -14

• -7

Find the next three terms: 4, 12, 36, 108, ...

• 324, 972, 2916

• 972, 2916, 8748

• 405, 1215, 3645

Find the 32nd term of this sequence.
34, 37, 40, 43, ...

• 32

• 64

• 127

• 356

Find the 32nd term of this sequence.
9, 4, -1, -6, -11, ...

• 81

• -34

• -146

• -225

Evaluate the Arithmetic Series

• 105

• 210

• 100

• 420

• 2400

• 2450

• 4800

• 9700

Find the sum of the infinite geometric series, if it exists:

5 + 4 + 3.2 + 2.56 + ...

• 25

• 30

• -1

• 0.8

What is the value of r for the following sequence. 1/2 , 1/4 , 1/8 , 1/16 ...

• 2

• -2

• 1/2

• -1/2

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

• 1,600

• 18,235

• 18,475

• 19,125