Question Detail
Question
Which term of the arithmetic progression 5, 9, 13, 17, ... equals 81?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Setting T_n = 5 + (n - 1)4 = 81 gives 4(n - 1) = 76, so n - 1 = 19 and n = 20.
Hint
No hint available