Question Detail
Question
Find the sum of the first 10 terms of the arithmetic series: 3, 6, 9, 12,...
Correct Answer
Option C is the correct answer.
Detailed Explanation
a = 3, d = 3, n = 10. S₁₀ = 10/2[2(3) + 9(3)] = 5[6 + 27] = 5 × 33 = 165.
Hint
The notes indicate answer C.