What is the sum of the arithmetic sequence 3, 9, 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.