let us take a number 5 For proof that its power is raised to zero it will give

= 5 = 5

Dividing 5 on both sides

=>. 5/5 =5/5

When denomerator is take over the fraction its power become negative

=>5.5^-1 = 1. Other side is solved and answer is one one side is not solved for having a good proof

=> 5^1-1 = 1 : when bases are same exponent are added

=>5° = 1 because 1-1 is equal to zero

Hence proved I am sure you will like it