Answer:
A, D
Explanation:
For a rational exponent, he numerator becomes an exponent, and the denominator becomes the index of the root.
A. 8^(9/2) means the square root of 8, raised to the 9th power. True.
B. 125^(3/7) means the seventh root of 125, raised to the 3rd power. False.
C. 12^(1/7) means the seventh root of 12, raised to the 1st power. False.
D. 4^(5/2) means the square root of 4, raised to the 5th power. True.