CPM Homework Help : INT3 Problem 10-191

Use the Binomial Theorem to expand each of the following expressions.

$\quad ( 1 + \frac { 1 } { n } ) ^ { 3 }$
Answer (a):
$1+\frac{3}{n}+\frac{3}{n^2}+\frac{1}{n^3}$

$\quad ( 1 + \frac { 1 } { n } ) ^ { 5 }$
Hint (b):
Use the same method as in part (a).