Question

What is the sum of the series?​

Answer 1

44

Hope this helped!!

Answer 2

44

Explanation:

k=1: 2*1-4 = -2

k=2: 2*2²-4 = 4

k=3: 2*3²-4 = 14

k=4: 2*4²-4 = 28

-2 + 4 + 14 + 28 = 44