Question Detail
Question
Find the sum of the first 20 terms of the arithmetic progression 2, 5, 8, 11, ...
Correct Answer
Option A is the correct answer.
Detailed Explanation
Using S_n = (n/2)[2a + (n - 1)d] with n = 20, a = 2, and d = 3 gives S_20 = 10[4 + 19(3)] = 10[61] = 610.
Hint
No hint available