JEE Main 2026 Mathematics question
If the sum of the first four terms of an A.P. is 6 and the sum of its first six terms is 4, then the sum of its first twelve terms is
Answer: (4)
Solution
Solving and gives , . .
If the sum of the first four terms of an A.P. is 6 and the sum of its first six terms is 4, then the sum of its first twelve terms is
Solving and gives , . .