DS Question

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simplythebest: Junior | Next Rank: 30 Posts; Posts: 22; Joined: Mon Sep 18, 2006 10:17 am

by simplythebest » Wed Jun 06, 2007 2:22 am

If a and b are positive, is (a-1 + b-1)-1 less than (a-1b-1)-1?
(1) a = 2b
(2) a + b > 1

Source: Beat The GMAT — Data Sufficiency | Wed Jun 06, 2007 2:22 am

jayhawk2001: Community Manager; Posts: 789; Joined: Sun Jan 28, 2007 3:51 pm; Location: Silicon valley, California; Thanked: 30 times; Followed by:1 members

by jayhawk2001 » Wed Jun 06, 2007 6:20 am

simplythebest wrote:If a and b are positive, is (a-1 + b-1)-1 less than (a-1b-1)-1?
(1) a = 2b
(2) a + b > 1

can you please clarify what a-1b-1 is ? is it the product of a-1 and b-1 ?

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