Sum of Geometric Sequences

Find the common ratio: 64, -16, 4, -1, ...

• r = -8
• r = -1/4
• r = -4
• r = 4

Find the common ratio: 16, 8, 4, 2, ...

• r = 2
• r = 8
• r = 1/4
• r = 1/2

What is the SUM of the first 10 terms for the following geometric series:

2-6+18-54+...

• 59048

• -29524

• 524288

• 3069

Evaluate (aka: find the sum) the geometric series below:

4 - 8 - 16 - 32..., n = 7

• 195

• 172

• 202

• 145

Given the geometric series below, find the "a₁" value.

-5 + 10 - 20 + 40, ..... n = 10

• 10

• -2

• -5

• 5

Which of the following represents the SUM of a geometric series with 8 TOTAL terms and whose FIRST TERM is 3 and whose COMMON RATIO is 4?

• 32,756

• 42,560

• 28,765

• 65,535

Which of the following represents the SUM of a geometric series with 8 TOTAL terms and whose FIRST TERM is 3 and whose COMMON RATIO is 4?

• 32,756

• 42,560

• 28,765

• 65,535

What is the SUM of the first 10 terms for the following geometric series:

2-6+18-54+...

• 59048

• -29524

• 524288

• 3069

Evaluate (that is, find the sum) the geometric series below:

4 - 8 - 16 - 32..., n = 7

• 195

• 172

• 202

• 145

Evaluate the geometric series below:
a₁ = 4, a_n = 262144, r = 4

• 349524
• 341690
• 344023
• 338135