Which of the following is the simplified form of fifth root of x times the fifth root of x times the fifth root of x times the fifth root of x? a) x to the 1 over fifth power
b) x to the 4 over fifth power
c) x to the 4 over twentieth power
d) x

The mathematically expression of the given above is,
                (x^1/5)(x^1/5)(x^1/5)(x^1/5)
For the same variable involved in the operation multiplication, the exponents should be added. Thus, the answer is,
                             x^4/5
or x to the 4 over fifth power. The answer is letter B.