Question Detail
Question
If the 5th term of an AP is 19 and the 8th term is 31, find the first term.
Correct Answer
Option A is the correct answer.
Detailed Explanation
Subtracting the equations gives 3d = 31 - 19 = 12, so d = 4. Substituting back yields a + 4(4) = 19, hence a = 3.
Hint
No hint available