Question
Find a general term $a_{n}$ for each sequence, whose first four terms are given. See Example 3.$$-4,16,-64,256$$
Step 1
This suggests that we need a factor of $(-1)^n$ in our general term, where $n$ is the term number. This is because $(-1)^n$ alternates between -1 and 1 as $n$ increases, which matches the alternating pattern of our sequence. Show more…
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