DS inequality qn

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santham: Junior | Next Rank: 30 Posts; Posts: 13; Joined: Sat May 28, 2011 12:37 pmFollowed by: 1 member

by santham » Sat Jul 16, 2011 11:52 am

If vmt â‰ 0, is v2m3t-4 > 0?
(1) m > v2
(2) m > t-4

can anyone explain the answer with explanation?

Thanks

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Source: Beat The GMAT — Data Sufficiency | Sat Jul 16, 2011 11:52 am

maihuna: Legendary Member; Posts: 1578; Joined: Sun Dec 28, 2008 1:49 amFollowed by: 9 members; Thanked: 82 times; GMAT Score:720

by maihuna » Sat Jul 16, 2011 11:56 am

i m assuming t-4 is actually t^1/4

v^2 and t^1/4 are all positive no. so for v2m3t-4 > 0 m should be greater than 0.

A says m> a positive no, so m>0 so suff.

similarly B,m>a posityive no so suff.ANs D

But if it is t-4 ans will be C

santham wrote:If vmt â‰ 0, is v2m3t-4 > 0?
(1) m > v2
(2) m > t-4

can anyone explain the answer with explanation?

Thanks

Charged up again to beat the beast

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santham: Junior | Next Rank: 30 Posts; Posts: 13; Joined: Sat May 28, 2011 12:37 pmFollowed by: 1 member

by santham » Sat Jul 16, 2011 1:32 pm

Apologies, formatting the qn properly,

If vmt â‰ 0, is (v^2) * (m^3) *(t^-4) > 0?
(1) m > v2
(2) m > t-4

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