Question
Each of Exercises $1-6$ gives a formula for the $n$ th term $a_{n}$ of asequence $\left\{a_{n}\right\} .$ Find the values of $a_{1}, a_{2}, a_{3},$ and $a_{4} .$$$a_{n}=\frac{1}{n !}$$
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Each of Exercises $1-6$ gives a formula for the $n$ th term $a_{n}$ of a sequence $\left\{a_{n}\right\} .$ Find the values of $a_{1}, a_{2}, a_{3},$ and $a_{4} .$ $$ a_{n}=\frac{1-n}{n^{2}} $$
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Each of Exercises $1-6$ gives a formula for the $n$ th term $a_{n}$ of a sequence $\left\{a_{n}\right\} .$ Find the values of $a_{1}, a_{2}, a_{3},$ and $a_{4} .$ $$ a_{n}=2+(-1)^{n} $$
Each of Exercises $1-6$ gives a formula for the $n$ th term $a_{n}$ of a sequence $\left\{a_{n}\right\} .$ Find the values of $a_{1}, a_{2}, a_{3},$ and $a_{4} .$ $$ a_{n}=\frac{(-1)^{n+1}}{2 n-1} $$
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