If a > 0, b>0, and c>0, is a(b-c) = 0?
1) b-c = c-b
2) b/c = c/b
5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
Algebraic expression - D
This topic has expert replies
-
tanyajoseph
- Master | Next Rank: 500 Posts
- Posts: 103
- Joined: Wed May 30, 2007 6:17 am
- Followed by:1 members
-
agps
- Master | Next Rank: 500 Posts
- Posts: 101
- Joined: Tue Aug 07, 2007 1:45 am
- Followed by:1 members
this is a data sufficiency question right?
1) b-c=c-b -> 2b=2c -> b=c, then b-c=0, so it's sufficient.
2) b/c=c/b -> b^2=c^2, since both b and c > 0 this also means that b=c, also sufficient, answer D.
1) b-c=c-b -> 2b=2c -> b=c, then b-c=0, so it's sufficient.
2) b/c=c/b -> b^2=c^2, since both b and c > 0 this also means that b=c, also sufficient, answer D.
-
jaspreet.sharma
- Junior | Next Rank: 30 Posts
- Posts: 24
- Joined: Wed Aug 22, 2007 4:49 pm
- Thanked: 3 times
tanyajoseph wrote:If a > 0, b>0, and c>0, is a(b-c) = 0?
1) b-c = c-b
2) b/c = c/b
Shouldnt the answer be A
Correct me if am wrong.
As 2nd cond says
b^2 = c^2
b^2 - c^2 =0
(b-c)(b+c)= 0
b=c or b=-c
and if b=-c then a(b-c) is not equal to 0
-
jaspreet.sharma
- Junior | Next Rank: 30 Posts
- Posts: 24
- Joined: Wed Aug 22, 2007 4:49 pm
- Thanked: 3 times
blah45 wrote:b>0 and c > 0, so b=-c will NOT hold true.jaspreet.sharma wrote:
and if b=-c then a(b-c) is not equal to 0
Thus, my answer is D.
Oh thanks for correcting me
....i missed that part.....
