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04 Mar 2020, 10:20
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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:
5%
(low)
Question Stats:
92% (00:58) correct
8%
(02:34)
wrong
based on 49
sessions
History
Date
Time
Result
Not Attempted Yet
A # 0 or 1, then \(\frac{(\frac{1}{a})}{2-(\frac{2}{a})} =\)
A. \(\frac{1}{2a-2}\)
B. \(\frac{2}{a-2}\)
C. \(\frac{1}{a-2}\)
D. \(\frac{1}{a}\)
E. \(\frac{2}{2a-1}\)
A. \(\frac{1}{2a-2}\)
B. \(\frac{2}{a-2}\)
C. \(\frac{1}{a-2}\)
D. \(\frac{1}{a}\)
E. \(\frac{2}{2a-1}\)
05 Mar 2020, 00:16
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SajjadAhmad
The question is NOT clear as written but looking at answer choices, I believe it should be (1/a)/2-(2/a) = \(\frac{(\frac{1}{a})}{2-(\frac{2}{a})} =\)..
\(\frac{(\frac{1}{a})}{2-(\frac{2}{a})} =\) \(\frac{(\frac{1}{a})}{(\frac{2a-2}{a})} =\)\(\frac{1}{2a-2}\)
A
or just take a value of a and solve
05 Mar 2020, 03:32
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Gah! I didn't use the clock. But the approach to use here is to pick some values, people. If you "used" the answer choices you might initially pick the number 2 for a.
So let's do that.
If we let A = 2, the question stem will give the value 1/2
If we start plugging in the value (2) into the "a" of all the answer choices, immediately B and C get thrown out for becoming undefined. 1 divided by 0 is undefined for example. We also get to eliminate (E) since it spits out a (2/3) answer instead of (1/2).
Now we're down to (A) and (D). If you shrewdly chose the value (2) for the value "a" you might have been a bit hasty and chosen (A) quickly because it spits out a (1/2) like our given equation. Careful. Go through all the answer choices. Both A and D both give out the same value of (1/2)!
Use another value (for example a=3) and repeat the process. Only (A) stands by the end of this whole affair.
This is a trip question, I feel. For those who plug a value and quickly and go AHA! and quickly move on.
Some Kudos would be nice
So let's do that.
If we let A = 2, the question stem will give the value 1/2
If we start plugging in the value (2) into the "a" of all the answer choices, immediately B and C get thrown out for becoming undefined. 1 divided by 0 is undefined for example. We also get to eliminate (E) since it spits out a (2/3) answer instead of (1/2).
Now we're down to (A) and (D). If you shrewdly chose the value (2) for the value "a" you might have been a bit hasty and chosen (A) quickly because it spits out a (1/2) like our given equation. Careful. Go through all the answer choices. Both A and D both give out the same value of (1/2)!
Use another value (for example a=3) and repeat the process. Only (A) stands by the end of this whole affair.
This is a trip question, I feel. For those who plug a value and quickly and go AHA! and quickly move on.
Some Kudos would be nice
