Arithmetic Sequences and Series and Geometric Sequences

Is the sequence arithmetic: 78, 785, 7855, 78555, ...

• Yes

• No

Evaluate the Arithmetic Series

• 105

• 210

• 100

• 420

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

5 + 4 + 3.2 + 2.56 + ...

• 25

• 5

• -1

• 0.8

Determine whether the sequence could be geometric or arithmetic:

6, 10, 15, 21, ...

• Geometric with r = 5/3

• Arithmetic with d = 4

• Geometric with r = 4

• Neither

What is the sum of the first 10 terms for the following geometric series:
2-6+18-54+...

• 59048

• -29524

• 524288

• 3069

Find the sum for the following series. 

• 49

• 3.14

• 1.33

• 1.66

Which series are Arithmetic? (select ALL that apply)

• 2 + 4 + 8 + 16...

• 7 + 15 + 23 + 31...

• 80 + 68 + 56 + 44...

• 1 + 3 + 7 + 11...

• -10 + (-8) + (-6) + (-4)...

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

• yes

• no

Is this sequence Arithmetic, Geometric, or Neither?
{14, 22, 30, 38, .. }

• Arithmetic

• Geometric

• Neither

What is the common difference of the arithmetic sequence below?
-6, -1, 4, 9...

• 5

• -5

• -6

• 1/5