CPM Homework Help : PC3 Problem 3-73

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Home > PC3 > Chapter 3 > Lesson 3.1.5 > Problem 3-73

3-73.

Simplify: $(a^{-1}-b^{-1})^{-1}$ .

Step 1:

$\left(\frac{1}{a}-\frac{1}{b}\right)^{-1}$

Step 2:

$\left(\frac{b}{ab}-\frac{a}{ab}\right)^{-1}$

Step 3:

$\left(\frac{b-a}{ab}\right)^{-1}$

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