isi-entrance 2015 Q22

isi-entrance · India · UGB 4 marks Sequences and Series Limit Evaluation Involving Sequences
The value of $\lim _ { n \rightarrow \infty } \frac { 1 ^ { 3 } + 2 ^ { 3 } + \ldots + n ^ { 3 } } { n ^ { 4 } }$ is:
(a) $\frac { 3 } { 4 }$
(b) $\frac { 1 } { 4 }$
(c) 1
(d) 4.
(b) Use the formula for $\sum _ { i = 1 } ^ { n } i ^ { 3 }$.
The value of $\lim _ { n \rightarrow \infty } \frac { 1 ^ { 3 } + 2 ^ { 3 } + \ldots + n ^ { 3 } } { n ^ { 4 } }$ is:\\
(a) $\frac { 3 } { 4 }$\\
(b) $\frac { 1 } { 4 }$\\
(c) 1\\
(d) 4.