Jeff Miller

GMAT OFFICIAL GUIDE PS – If s > 0 and √(r/s) = s…

If s > 0 and √(r/s) = s…

Solution:

To solve, we need to simplify the equation √(r/s) = s.

We first want to eliminate the square root, so we square both sides, obtaining:

(√(r/s))^2 = s^2

r/s = s^2

To isolate r, we multiply the entire equation by s and we get:

r = s^3

Answer: D