Sum of an Arithmetic Sequence

The sum of n terms of an arithmetic sequence is given by the formula : ________

Fimd the sum of the first eleven terms of the sequence: 28, 34, 40, ... , 88

• 550

• 638

• 610

• 288

Find the sum of the first 10 terms of the arithmetic series:

2 + (-2) + (-6) + (-10) + ...

• -160

• -320

• -328

• -336

Find the sum of last ten terms of the given arithmetic sequence:

8, 10, 12, 14, ... , 126

• 1176

• 1234

• 1123

• 1170

Q1. How many people live in the city?

• A) 149

• B) 11,200

• C) 5,600

• D) 140

Find the sum of the first 16 terms of the arithmetic series

• A

• B

• C

• D

Find S_n for the given series:
a₁=22
d=-8
n=21

• 1911

• -1449

• -2436

• -1218

Find the sum of the first 15 terms of the arithmetic series

• A

• B

• C

• D

Find the sum of the first 12 terms of the arithmetic series

• A

• B

• C

• D

What is the sum of the first 15 terms of an arithmetic sequence if the 8^th term is 40?

• 320

• 600

• 650

• 900

Answer explanation