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05 Mar 2014, 02:09
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
81% (01:12) correct
19%
(02:02)
wrong
based on 2599
sessions
History
Date
Time
Result
Not Attempted Yet
If \(\frac{x + y}{xy} = 1\), then \(y =\)
(A) \(\frac{x}{x - 1}\)
(B) \(\frac{x}{x + 1}\)
(C) \(\frac{x - 1}{x}\)
(D) \(\frac{x + 1}{x}\)
(E) \(x\)
(A) \(\frac{x}{x - 1}\)
(B) \(\frac{x}{x + 1}\)
(C) \(\frac{x - 1}{x}\)
(D) \(\frac{x + 1}{x}\)
(E) \(x\)
05 Mar 2014, 02:09
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SOLUTION
If (x + y)/(xy) = 1, then y =
(A) x/(x - 1)
(B) x/(x + 1)
(C) (x - 1)/x
(D) (x + 1)/x
(E) x
\(\frac{x + y}{xy} = 1\);
\(x + y = xy\);
\(x = xy-y\);
\(x = y(x-1)\);
\(y=\frac{x}{x-1}\).
Answer: A.
If (x + y)/(xy) = 1, then y =
(A) x/(x - 1)
(B) x/(x + 1)
(C) (x - 1)/x
(D) (x + 1)/x
(E) x
\(\frac{x + y}{xy} = 1\);
\(x + y = xy\);
\(x = xy-y\);
\(x = y(x-1)\);
\(y=\frac{x}{x-1}\).
Answer: A.
General Discussion
05 Mar 2014, 19:34
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\(Answer = A = \frac{x}{(x - 1)}\)
\(\frac{(x + y)}{(xy)} = 1\)
x + y = xy
xy - y = x
y(x-1) = x
\(y = \frac{x}{(x-1)}\)
\(\frac{(x + y)}{(xy)} = 1\)
x + y = xy
xy - y = x
y(x-1) = x
\(y = \frac{x}{(x-1)}\)
