# MandysNotes

Saturday, 20 March 2010 00:00

## Inverse Properties

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For any real number $$a \neq 0 :$$

$$a + (-a) = 0 \$$ and,

$$a \left( \frac{1}{a} \right) = 1.$$

That is, any number times its reciprocal equals 1.

The reciprocal of zero is not defined.