**Q:** What is a negative exponent?

**A:** A number raised to a negative exponent produces the reciprocal of that number. Recall that a reciprocal is just 1 divided by the number. It is very useful to **memorize these identities**:

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**Q:** How do I evaluate a zero exponent?

**A:** Any number raised to the power of zero is equal to 1.

, , , or in general:

Why? Because:

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