What is the sum of the arithmetic sequence 8, 14, 20 ..., if there are 22 terms?

Question

Mathematics

Nico Mckay

3 April, 10:30

What is the sum of the arithmetic sequence 8, 14, 20 ..., if there are 22 terms?

+3

Answers (2)

Know the Answer?

Bruno Kirby · Answer 1

Bruno Kirby 3 April, 13:03

0

Answer: I'm pretty sure its 1562

Gavin Weaver · Answer 2

The sum of 22 terms of given AP = 1562

Step-by-step explanation:

Formula:-

Sum of n terms of AP,

Sₙ = (n/2) [2a + (n - 1) d]

To find the sum of 22 terms

Here. a = 8, d = 6 and n = 22

Sₙ = (n/2) [2a + (n - 1) d]

S₂₂ = (22/2) [2*8 + (22 - 1) * 6]

= 11[16 + 126] = 11 * 142 = 1562