Answer
Second Term: 15
Fourth Term: 21
Tenth Term: 39
Work Step by Step
We found each term by plugging in their place value (2, 4, 10) into the given equation for n. So in order to find the tenth term, we plug in 10 into the equation below for n:
A(n)=12+(n-1)3
When we simplify, we get 39 so therefore that is the tenth term. We can do the same process for the rest of the terms.
