Question Detail
Question
Which statements are universally true for any AP with first term a and common difference d != 0?
Correct Answer
Option A is the correct answer.
Detailed Explanation
T_n is linear in n, non-zero d guarantees strict increase or decrease, and S_n = (d/2)n^2 + (a - d/2)n has no constant term. The product of terms can be negative.
Hint
No hint available