Answer:
common denominator is ab.
Step-by-step explanation:
Given : [tex]\frac{1}{a} +\frac{1}{b}[/tex] ; complex fraction [tex]\frac{\frac{1}{a} - \frac{1}{b}}{\frac{1}{a}+\frac{1}{b}}[/tex].
To find : What is the common denominator.
Solution : We have given that [tex]\frac{\frac{1}{a} - \frac{1}{b}}{\frac{1}{a}+\frac{1}{b}}[/tex].
For this, we subtract fractions in the numerator and the sum of fractions in the denominator.
[tex]\frac{\frac{b-a}{ab}}{\frac{b+a}{ab}}[/tex].
We observe that the common denominator is given by the product: ab
Therefore, common denominator is ab.
