# What is the nth in the arithmetic sequence: 0.2,- 0.6,- 1.4,- 2.2?

Apr 23, 2017

$1 - 0.8 n$

#### Explanation:

The nth term of an arithmetic sequence is

$a + \left(n - 1\right) d$

where $a$ is the first term and $d$ is the common difference.

So

$a = 0.2 \mathmr{and} d = - 0.8$

Hence, the nth term is

$0.2 - 0.8 \left(n - 1\right)$

$\implies 0.2 - 0.8 n + 0.8$

so

$1 - 0.8 n$

:)>