GMAT prep PS question

dumb.doofus: Master | Next Rank: 500 Posts; Posts: 435; Joined: Sat Sep 27, 2008 2:02 pm; Location: San Jose, CA; Thanked: 43 times; Followed by:1 members; GMAT Score:720

by dumb.doofus » Mon Apr 20, 2009 9:35 pm

I dont know man.. but I checked this question in Google Chrome and Safari web browser.. what you have put is so wide that these community sponsor ads come over it and so I can't even read the question properly..

anyone facing such problem??

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mlane25269: Master | Next Rank: 500 Posts; Posts: 151; Joined: Fri Jun 13, 2008 7:31 am; Thanked: 1 times

by mlane25269 » Mon Apr 20, 2009 9:45 pm

If you copy the image to a Word doc you should be able to see all of it without the banner ads covering it.

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dumb.doofus: Master | Next Rank: 500 Posts; Posts: 435; Joined: Sat Sep 27, 2008 2:02 pm; Location: San Jose, CA; Thanked: 43 times; Followed by:1 members; GMAT Score:720

by dumb.doofus » Mon Apr 20, 2009 10:02 pm

mlane25269 wrote:If you copy the image to a Word doc you should be able to see all of it without the banner ads covering it.

Hey thanks buddy..

as I see it.. its a basic geometric progression.. with initial value a = 1/2
and r = -1/2 and n = 10

so sum of n terms in a geometric progression is a(1-r^n)/(1-r)

just put the values.. and this gives..

This is approximately 1/3rd.. so I would choose D.. i.e. between 1/4 and 1/2

One love, one blood, one life. You got to do what you should.
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dabral: Master | Next Rank: 500 Posts; Posts: 134; Joined: Fri Jan 23, 2009 1:23 pm; Location: California; Thanked: 59 times; Followed by:15 members

Re: GMAT prep PS question

by dabral » Tue Apr 21, 2009 6:54 pm

Please see my video solution.

https://www.gmatquantum.com/shared-posts ... nces9.html

mlane25269 wrote:Can someone explain? Thanks!

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