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x=1/y
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01 Apr 2019, 13:41
01 Apr 2019, 13:41
Expert Reply
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Question Stats:
92% (00:25) correct
7% (01:15) wrong based on 28 sessions
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\(x = \frac{1}{y}\)
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
\(x + 1 + \frac{1}{x}\) |
\(y+1+\frac{1}{y}\) |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: x=1/y
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01 Apr 2019, 17:19
01 Apr 2019, 17:19
Carcass wrote:
\(x = \frac{1}{y}\)
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
\(x + 1 + \frac{1}{x}\) |
\(y+1+\frac{1}{y}\) |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Nice rule: 1/(a/b) = b/a
For example, 1/(3/4) = 4/3
Given:
QUANTITY A: x + 1 + 1/x
QUANTITY B: y + 1 + 1/y
Since we're told that x = 1/y, we can replace x with 1/y to get:
QUANTITY A: 1/y + 1 + 1/(1/y)
QUANTITY B: y + 1 + 1/y
Simplify Quantity A to get:
QUANTITY A: 1/y + 1 + y/1
QUANTITY B: y + 1 + 1/y
Simplify Quantity A (again!) to get:
QUANTITY A: 1/y + 1 + y
QUANTITY B: y + 1 + 1/y
Answer: C
Cheers,
Brent
gmatclubot
Re: x=1/y [#permalink]
01 Apr 2019, 17:19
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