Please help!
Express the series using sigma notation. 8 + 10 + 12 + ... + 24.

Answer:
C
Step-by-step explanation:
Number on top: largest value of k
On the right: the expression for k
Bottom: the first number for k
So,
1. 2³ = 8, but k can not be 3, so it can't be A or B.
2. 8 ÷ 2 = k, which means that the first k should be 4.
So, the answer is C.