-
Vincen
- Legendary Member
- Posts: 2898
- Joined: Thu Sep 07, 2017 2:49 pm
- Thanked: 6 times
- Followed by:5 members
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
If \(k > 1,\) which of the following must be equal to \(\dfrac2{\sqrt{k+1}+\sqrt{k-1}}?\)
A. \(2\)
B. \(2\sqrt{2k}\)
C. \(2\sqrt{k+1}+\sqrt{k-1}\)
D. \(\dfrac{\sqrt{k+1}}{\sqrt{k-1}}\)
E. \(\sqrt{k+1}-\sqrt{k-1}\)
Answer: E
Source: Manhattan GMAT
A. \(2\)
B. \(2\sqrt{2k}\)
C. \(2\sqrt{k+1}+\sqrt{k-1}\)
D. \(\dfrac{\sqrt{k+1}}{\sqrt{k-1}}\)
E. \(\sqrt{k+1}-\sqrt{k-1}\)
Answer: E
Source: Manhattan GMAT
