JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

1 Easy

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Application +4 | -1

The first and last term of an A.P. are

a

and

l

respectively. If

S

be the sum of all the terms of the A.P., then the common difference is

View answer and explanation

Correct option: A

\frac{l^2-a^2}{2 S-(l+a)}

Option A is correct because the common difference is derived by using the formulas for the last term and the sum of an A.P.

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