a, b are positive numbers Which one is bigger? (a^-1+b^-1) : DS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 21 Jan 2017, 18:06

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# a, b are positive numbers Which one is bigger? (a^-1+b^-1)

Author Message
Joined: 31 Dec 1969
Location: Russian Federation
Concentration: Technology, Entrepreneurship
GMAT 1: 710 Q49 V0
GMAT 2: 700 Q V
GMAT 3: 740 Q40 V50
GMAT 4: 700 Q48 V38
GMAT 5: 710 Q45 V41
GMAT 6: 680 Q47 V36
GMAT 7: Q42 V44
GMAT 8: Q42 V44
GMAT 9: 740 Q49 V42
GMAT 10: 740 Q V
GMAT 11: 500 Q47 V33
GMAT 12: 670 Q V
WE: Engineering (Manufacturing)
Followers: 0

Kudos [?]: 202 [0], given: 102257

a, b are positive numbers Which one is bigger? (a^-1+b^-1) [#permalink]

### Show Tags

08 Jul 2004, 15:24
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

a, b are positive numbers Which one is bigger? (a^-1+b^-1) ^-1 or (a^-1 * b^-1)
1) a=2b, 2) a+b>1
Director
Joined: 04 Jul 2004
Posts: 904
Followers: 4

Kudos [?]: 51 [0], given: 0

### Show Tags

09 Jul 2004, 05:29
(E)

Two numbers are:
ab/(a+b) and 1/ab

1: Insufficient
2: Insufficient

Combining:
we get b>1/3

Two numbers again after placing the value
2b/3 and 1/2b^2
which have the critical value 3/4

So Insufficient.

Correct me if I am wrong.
09 Jul 2004, 05:29
Display posts from previous: Sort by