Question
Find the first five terms of the sequence $\left\{a_{n}\right\}$.$$a_{n}=(-1)^{n}+3 n$$
Step 1
We substitute $n=1$ into the formula $a_{n}=(-1)^{n}+3 n$ to get $a_{1}=(-1)^{1}+3(1)=-1+3=2$. Show more…
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