Geometric series

What is the sum of the first 10 terms of the sequence 3,6,12,24,...a10?

• 3069

• 3079

• 3690

• 3960

What is the sum of the first 8 terms of the sequence 5, 15, 45, 135,...a8?

• 5465

• 16400

• 49205

• 147620

The sum of the first five terms is 341 and the common ratio is 4. Find the first term.

• 4

• 3

• 2

• 1

What is the sum of the first 7 terms of the geometric sequence 6,12,24,48,...a7?

• 1530

• 762

• 3066

• 378

Find the sum of the series 1+5+25+125+...+a10.

• 2114460

• 2441406

• 241406

• 2114460

Find the sum of the first 5 terms of the sequence whose first term is 7 and the common ratio is 7.

• 19607

• 19608

• 19609

• 19610

What is the sum of the first 6 terms of the sequence 5, 15, 45, 135,...a6?

• 5465

• 1640

• 1820

• 605

What is the sum of the first 5 terms of the geometric sequence whose first term is 400 and the common ratio is 1/2?

• 787.5

• 775

• 750

• 700

What is the sum of this series 64 + 16 + 4 + 1 + 1/4?

• 84 1/4

• 85

• 85 1/4

• 85 3/4

What is the sum of the first five terms of the geometric sequence 3,12,48,192,...?

• 1013

• 1023

• 1033

• 1043