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

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Answer 1 · 2017-04-23T08:24:17

#1 - 0.8n#

The nth term of an arithmetic sequence is

#a + (n - 1)d#

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

So

#a = 0.2 and d = -0.8#

Hence, the nth term is

#0.2 - 0.8(n - 1)#

#=> 0.2 - 0.8n + 0.8#

so

#1 - 0.8n#

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