## Exponents

The exponent of a number x says how many times to multiply the number x by itself. Number x is called the **base**.

$$2^4=2×2×2×2=16$$

$$3^3=3×3×3=81$$

There are some special exponents we need to remember:

$$x^0=1$$

$$x^1=x$$

$$x^{-n}=1/x^n$$

$$x^{1/n}=√^n{x}$$