Find the sum of the arithmetic sequence. 15,17,19,21,...,33

Question

asked Apr 1, 2022 129k views

1 Answer

Pansoul · Answer 1 · 2022-04-06T15:46:45+0000

Answer:

as formula says:

sum =

in our case n = 10, a1 = 15 and An = 33 so the answer will be:

sum = 10 * (33 + 15)/2 = 10 * 48 / 2 = 10 * 24 = 240

Explanation: