Question

Could you show me two examples for this rule?

Answer 1

As in you don't understand the rule or the example or both?

Answer 2

I just don't understand it. I think another example would help

Answer 3

Think of x = 2.
Then x^2 = 2^2
Then x^3 = 2^3.

Basically for two or more equal values, if you raise that value to a power of n, then each of those values raised to n-power will be equal.

Answer 4

ok so since a=b right, (based on the definition given in your photo), a and b are essentially the same. So if you have to same numbers to the same powers, the answer is the same.
E.g.Let a be 2. Since a =b, b is also 2.
so a^n=b^n
Since a=b=2,
2^n=2^n
can? :D