CPM Homework Help : AC Problem 7-131

Simplify the following fractions.

Hint:

Remove the fractions in the numerator and in the denominator. See problem 7-97 for help.

$\frac { \frac { 1 } { a } - \frac { 1 } { b } } { \frac { 1 } { a } + \frac { 1 } { b } }$
Answer (a):
$\frac{\textit{b}-\textit{a}}{\textit{b}+\textit{a}}$
$\frac { x + y } { \frac { 1 } { x } + \frac { 1 } { y } }$