Find the indicated terms in each of the sequences where $n^{t h}$ term is :

$a_{n} = (- 1)^{n - 1} n^{3}; a_{9}$

Open in App

Solution

Here, $a_{n} = (- 1)^{n - 1} . n^{3} .$

Putting n = 9, we have

$a_{9} = (- 1)^{9 - 1} . (9)^{3} = (- 1)^{8} . 729 = 729$

Thus, the $9^{t h}$ term of the sequence is 729.

Suggest Corrections

Similar questions

n^{t h}

a_{n} = (- 1)^{n - 1} n^{3}; a_{9}

Find the 9^th term in the following sequence whose n^th term is

Find the indicated terms in each of the sequences in where $n^{t h}$ terms are :

$a_{n} = \frac{n^{2}}{2^{n}}; a_{7}$

Find the indicated terms in each of the sequences in where $n^{t h}$ terms are :

$a_{n} = \frac{n (n - 2)}{n + 3}; a_{20}$

Find the indicated terms in each of the sequences in where $n^{t h}$ terms are :

$a_{n} = 4 n - 3; a_{17}, a_{24}$

Join BYJU'S Learning Program