### Home > CAAC > Chapter 12 > Lesson 12.1.1 > Problem 12-7

12-7.

Anything to the zero power equals 1.

When multiplying like bases, add their exponents.

20*x*^{ −1} = ?

See the 'step' in part (b).

Rewrite the expression as multiplication three times.

Then follow the steps in part (b).