Question

What does the power rule of exponents say

Answer 1

Do you mean the Zero rule?

Anything to the power of zero is 1.

x^0 = 1

Answer 2

There are many rules of exponents and one of which is Power Rule.

Power rule of exponents means a number with an exponent raised to another exponent.
$(x^{a} )^{b} = x^{ab}$

You will just simply multiply the exponents which are a and b.

Example;
     $(x^{2} )^{5}= x^{10}$