Question

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

Answer 1

it seems the secquences is x+6

Answer 2

so with that being said
keep adding 6 until you get to the 22th term then just add them together

Answer 3

Where,
a=8
d=common difference
n=number of terms=22

Answer 4

DLS r u sure thats correct formula - isn't n/2 not a/2

Answer 5

Sorry,if its n/2,doing after a long time
Sn=n/2(2a+(n-1)d
Sn=1(16+21*6)
Sn=11(142)
Sn=1562

Answer 6

yes i just checked - so its 11(16 + 21*6)

Answer 7

wth is going on sorry
its Sn=11 (16+21*6)* not one ! (2nd line)