What is the sum of the arithmetic sequence 3, 9, 15 ..., if there are 22 terms?

1,452

1,728

2.028

2,268

The arithmetic sequence given above has a first term (a1) equal to 3 and the common difference (d) equal to 6. The sum of the first n terms of the sequence is calculated through the equation,

Sn = (n / 2) x (2a1 + (n - 1) x d)

Substituting,

S22 = (22 / 2) x (2x3 + (22 - 1) x 6) = 1452

Therefore, the answer is the first choice, 1452.