Hi All,
This question can be solved by TESTing VALUES. The key is to keep the values relatively small and think about how the square root sign impacts the math:
We're told that S > 0 and (r/s)^1/2=s
We're asked for the value of R.
IF....
R = 8
S = 2
\sqrt{4} = 2
So we're looking for an answer that = 8 when S = 2....
Answer A: 1/2 NOT a match
Answer B: \sqrt{2} NOT a match
Answer C: 2\sqrt{2} NOT a match
Answer D: 2^3 = 8 This IS a MATCH
Answer E: 2^2 - 2 = 2 NOT a match
Final Answer:
GMAT assassins aren't born, they're made,
Rich
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