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GRE Math Challenge #109-If x =1/y and y =1/(1-x)
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15 May 2015, 11:53
15 May 2015, 11:53
Expert Reply
00:00
Question Stats:
66% (01:07) correct
33% (00:17) wrong based on 9 sessions
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If x =\(\frac{1}{y}\)and y =\(\frac{1}{(1-x)}\), them y =
(A) 2
(B) 1/2
(C) -1/2
(D) -1
(E) -2
(A) 2
(B) 1/2
(C) -1/2
(D) -1
(E) -2
Re: GRE Math Challenge #109-If x =1/y and y =1/(1-x)
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19 Dec 2017, 07:55
19 Dec 2017, 07:55
sandy wrote:
If x =\(\frac{1}{y}\)and y =\(\frac{1}{(1-x)}\), them y =
(A) 2
(B) 1/2
(C) -1/2
(D) -1
(E) -2
(A) 2
(B) 1/2
(C) -1/2
(D) -1
(E) -2
Here
y =\(\frac{1}{(1-x)}\)
or y = \(\frac{y}{(y-1)}\)(putting x= \(\frac{1}{y}\))
or \(y^2\) -y = y
or y=2
gmatclubot
Re: GRE Math Challenge #109-If x =1/y and y =1/(1-x) [#permalink]
19 Dec 2017, 07:55
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