jee-main 2020 Q54

jee-main · India · session2_02sep_shift2 Arithmetic Sequences and Series Compute Partial Sum of an Arithmetic Sequence

If the sum of first 11 terms of an A.P. , $a _ { 1 } , a _ { 2 } , a _ { 3 } \ldots\ldots$ is $0 \left( a _ { 1 } \neq 0 \right)$ then the sum of the A.P $a _ { 1 } , a _ { 3 } , a _ { 5 } , \ldots\ldots a _ { 23 }$ is $k a _ { 1 }$ where $k$ is equal to
(1) $- \frac { 121 } { 10 }$
(2) $\frac { 121 } { 10 }$
(3) $\frac { 72 } { 5 }$
(4) $- \frac { 72 } { 5 }$

If the sum of first 11 terms of an A.P. , $a _ { 1 } , a _ { 2 } , a _ { 3 } \ldots\ldots$ is $0 \left( a _ { 1 } \neq 0 \right)$ then the sum of the A.P $a _ { 1 } , a _ { 3 } , a _ { 5 } , \ldots\ldots a _ { 23 }$ is $k a _ { 1 }$ where $k$ is equal to\\
(1) $- \frac { 121 } { 10 }$\\
(2) $\frac { 121 } { 10 }$\\
(3) $\frac { 72 } { 5 }$\\
(4) $- \frac { 72 } { 5 }$

Paper Questions

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