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Which one of the following does the expression
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02 Apr 2019, 06:02
02 Apr 2019, 06:02
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Which one of the following does the expression \(\frac{2^x +2^{x−1}}{2^{x+1}−2^x}\) equal?
(A) 1
(B) \(\frac{3}{2}\)
(C) 2
(D) \(\frac{5}{2}\)
(E) 3
(A) 1
(B) \(\frac{3}{2}\)
(C) 2
(D) \(\frac{5}{2}\)
(E) 3
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Re: Which one of the following does the expression
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02 Apr 2019, 06:24
02 Apr 2019, 06:24
1
Carcass wrote:
Which one of the following does the expression \(\frac{2^x +2^{x−1}}{2^{x+1}−2^x}\) equal?
(A) 1
(B) \(\frac{3}{2}\)
(C) 2
(D) \(\frac{5}{2}\)
(E) 3
(A) 1
(B) \(\frac{3}{2}\)
(C) 2
(D) \(\frac{5}{2}\)
(E) 3
A nice fast approach is to assign a nice value to x
Let's say x = 1
We get: \(\frac{2^x +2^{x−1}}{2^{x+1}−2^x}=\frac{2^1 +2^{1−1}}{2^{1+1}−2^1}\)
\(=\frac{2^1 +2^0}{2^2−2^1}\)
\(=\frac{2+1}{4−2}\)
\(=\frac{3}{2}\)
Answer: B
Cheers,
Brent
Re: Which one of the following does the expression
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18 Aug 2022, 03:33
18 Aug 2022, 03:33
Hello from the GRE Prep Club BumpBot!
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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