JEE Main 2019 Mathematics question
Let the sum of the first n terms of a non-constant A.P., be , where A is a constant. If d is the common difference of this A.P., then the ordered pair is equal to:
Answer: (D)
Solution
⇒ d = A, .
Let the sum of the first n terms of a non-constant A.P., be , where A is a constant. If d is the common difference of this A.P., then the ordered pair is equal to:
⇒ d = A, .