Question: 5 to what power equals 0?
Answer: If we plug in numbers, (for example let x = 5, a = 2, and b = 4) then: One rule for exponents is that exponents add when you have the same base. This means that 50 = 1. This works for any number x that you want to plug in except for x = 0,because 0/0 is indeterminate (it is like dividing zero by zero).