JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

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Application +4 | -1

a_1, a_2, a_3, \ldots, a_n

are in H.P., then

a_1 a_2+a_2 a_3+\ldots+a_{n-1} a_n=

View answer and explanation

Correct option: D

(n-1) a_1 a_n

Option D (

(n-1) a_1 a_n

) is correct because it is derived by manipulating the harmonic progression and summing the terms.

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