Question
Find any of the values of $a_{1}, r, a_{n}, n,$ or $S_{n}$ that are missing.$$r=-\frac{1}{2}, a_{n}=\frac{1}{8}, n=7$$
Step 1
Given that $r = -\frac{1}{2}$, $a_{n} = \frac{1}{8}$, and $n = 7$, we can substitute these values into the formula to find $a_{1}$. Show more…
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