Question
Evaluate $S_{6}$ for each arithmetic sequence.$$a_{n}=-\frac{1}{2} n+7$$
Step 1
Step 1: First, we need to find the first term of the sequence, $a_{1}$, by substituting $n=1$ into the formula for $a_{n}$: \[a_{1}=-\frac{1}{2}(1)+7=\frac{13}{2}\] Show more…
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