Answer:
A
Step-by-step explanation:
[tex]$ \frac {{\frac{a}{b}+1}}{{\frac{b}{a} - 1}} = \frac{{\frac{a}{b} + \frac{b}{b}}}{{\frac{b}{a} - \frac{a}{a}}} = \frac{{\frac{{a + b}}{b}}}{{\frac{{b - a}}{a}}} = \frac{{a + b}}{b}*\frac{a}{{b-a}}=\frac{{a(a+b)}}{{b(b-a)}}[/tex]
