ay2cheskelsebea ay2cheskelsebea

08-11-2016
Mathematics

contestada

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

a)1,558
b)1,560
c)1,562
d)1,564

Respuesta :

scme1702 scme1702

12-11-2016

The common difference in this sequence is 6
The sum of n terms of an arithmetic sequence is given by:
S = n/2 [2a₁ + (n - 1)d]
S = 22/2 [2(8) + (22 - 1)(6)]
S = 1562
The answer is C

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