Answer:
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.
Step-by-step explanation:
Please mark brainliest and have a great day!
Answer:
1452.
Step-by-step explanation:
Sum of n terms = n/2 [2a1 + d(n - 1) ] where a1 = the first term and d = the common difference.
Here a1 = 3 and d = 9-3 = 6.
So S22 = 11 [2*3 + 6(22-1)]
= 11 * 132
= 1452
