Question

Please help!


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

Answer 1

C

Explanation:

Answer 2

C

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.