Question

if an =5n +2 find the first four term
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Answer 1

Here is your answer.

Given:

$a_{n} \: = 5n + 2$

To find first four terms we must put n=1,2,3,4.

$put \: n = 1 \\ we \: get \: a = 5 + 2 = 7 \\ put \: \: n = 2 \\ a_{2} = 10 + 2 = 12 \\ put \: n = 3 \\ a_{3} = 15 + 2 = 17 \\ put \: n = 4 \\ a_{4} = 20 + 2 = 22$

So, the first four terms are 7,12,17,22.