jee-main 2020 Q53

jee-main · India · session2_03sep_shift2 Arithmetic Sequences and Series Optimization Involving an Arithmetic Sequence

If the sum of the series $20 + 19 \frac { 3 } { 5 } + 19 \frac { 1 } { 5 } + 18 \frac { 4 } { 5 } + \ldots\ldots\ldots$ up to $n ^ { \text {th} }$ term is 488 and the $n ^ { \text {th} }$ term is negative, then :
(1) $n ^ { \text {th} }$ term is $- 4 \frac { 2 } { 5 }$
(2) $n = 41$
(3) $n ^ { \text {th} }$ term is - 4
(4) $n = 60$

If the sum of the series $20 + 19 \frac { 3 } { 5 } + 19 \frac { 1 } { 5 } + 18 \frac { 4 } { 5 } + \ldots\ldots\ldots$ up to $n ^ { \text {th} }$ term is 488 and the $n ^ { \text {th} }$ term is negative, then :\\
(1) $n ^ { \text {th} }$ term is $- 4 \frac { 2 } { 5 }$\\
(2) $n = 41$\\
(3) $n ^ { \text {th} }$ term is - 4\\
(4) $n = 60$

Paper Questions

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