Chapter 9.1, Problem 4E

Writing the Terms of a Sequence In Exercises 5-10, write the first five terms of the sequence with the given nth term.

$a_n=2^n$

$a_n={\left(-\frac{2}{5}\right)}^n$

$a_n=\sin \frac{n\pi }{2}$

$a_n=\frac{3n}{n+4}$

$a_n={(-1)}^{n+1}\left(\frac{1}{2}\right)$

$a_n=2+\frac{2}{n}-\frac{1}{n^2}$