Find the indicated term in sequence, whose $n^{t h}$ term is: $a_{n} = (- 1)^{n - 1} n^{3}; a_{9}$

Open in App

Solution

Finding $a_{9}$ term of sequence.
Given, $a_{n} = (- 1)^{n - 1} n^{3}$
Substituting $n = 9$ in $a_{n}$ , we get
$a_{9} = (- 1)^{9 - 1} (9)^{3}$
$\Rightarrow a_{9} = (- 1)^{8} \cdot 729$
$\Rightarrow a_{9} = 729$

Hence, the value of $a_{9}$ term of sequence is $729$ .

Suggest Corrections

Similar questions

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

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

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

n^{t h}

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

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

n^{t h}

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

Join BYJU'S Learning Program

Explore more

Join BYJU'S Learning Program