SAT Math Multiple Choice Question 878: Answer and Explanation
8. Which of the following is equivalent to, for all values of x?
Correct Answer: D
Category: Passport to Advanced Math / Exponents
Strategic Advice: If you forget the rules for fractional exponents on Test Day, you can remember them by thinking about the fact that. You can also use the saying "power over root."
Getting to the Answer: Think of the saying "power over root" for. Think: 5 is the power of x and 7 is the root. This gives the seventh root of x raised to the fifth power, or, choice (D).