ds q

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dunkin77: Master | Next Rank: 500 Posts; Posts: 269; Joined: Sun Apr 01, 2007 5:41 am

by dunkin77 » Fri Jun 08, 2007 8:50 am

Hi,

I think the answer is C...but I am just curious what is the value of x...

(1), 2) combined...

X^5 = x^4/2,
X^4(2X -1) =0

is it 1/2 ?

Thanks,

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Source: Beat The GMAT — Data Sufficiency | Fri Jun 08, 2007 8:50 am

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

by jayhawk2001 » Fri Jun 08, 2007 4:32 pm

Using 1 and 2

x5 = x4 / (x4+1) = x4/2

So, x4 + 1 = 2 or x4 = 1

x4 = x3/2 = x2/4 = x1/8

So, x1 = 8*x4 = 8

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dunkin77: Master | Next Rank: 500 Posts; Posts: 269; Joined: Sun Apr 01, 2007 5:41 am

by dunkin77 » Fri Jun 08, 2007 5:17 pm

Oh I see. Thank you as always!!

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