JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

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Application +4 | -1

If the sum of first 11 terms of an

AP.,\,\,{a_1},{a_2},{a_3}.....

is 0

\left( {{a_1} \ne 0} \right),

then the sum of the

AP.,\,\,{a_1},{a_3},{a_5}.....\,{a_{23}}

k{a_1},

where

k

is equal to

View answer and explanation

Correct option: D

- \frac{{72}}{5}

Option D (

\frac{{-72}}{5}

) is correct because it is the value of k obtained by using the given condition about the sum of the first 11 terms of the AP being 0.

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