Which of the following is the radical expression of a to the five sevenths power ?

In the same way you can look an expression like 3 x (3/4) as multiplying 3 by 3 and then dividing that number by 4, you can look at an expression like as taking 3 to the 3rd power and then finding the 4th root of that number; in other words, .

By that same logic, could be written as the 7th root of a to the 5th, or

Since there are no choices listed, you should try list them please.

Simply y = a^(5/7) is how the question reads.