# Write the 9th term of the sequences whose n^{th} term is a_{n} = (- 1)^{n - 1} n^{3}

**Solution:**

The sequence is a list of numbers (or items) that exhibits a particular pattern

Here nth term is given as a_{n} = (- 1)^{n - 1} n^{3}

Substituting n = 9

To find the value of a_{9,}

We need to replace n with 9._{ }

= (- 1)^{9 - 1} 9^{3}

= 729

NCERT Solutions Class 11 Maths Chapter 9 Exercise 9.1 Question 9

## Write the 9th term of the sequences whose n^{th} term is a_{n} = (- 1)^{n - 1} n^{3}

**Summary:**

It is given that the nth term of the sequence is a_{n} = (- 1)^{n - 1} n^{3}. Therefore the 9th term of the sequence is 729

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