Question 1201812
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ANSWER: 2n<br>
The common difference is 2, so the formula for the n-th term is 2n+a for some number a.<br>
When n=1, the term is 2, so<br>
2(1)+a = 2
2+a = 2
a = 0<br>
So the formula for the n-th term is 2n+0, or just 2n.<br>