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24 Sep 2017, 23:56
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
65% (01:28) correct
35%
(01:40)
wrong
based on 143
sessions
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Time
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Not Attempted Yet
If \(y^{(3x)} = 5^x\) and y is a positive number, what is x?
(1) \(y = \sqrt[3]{5}\)
(2) \(y^x=5^{(\frac{x}{3})}\)
(1) \(y = \sqrt[3]{5}\)
(2) \(y^x=5^{(\frac{x}{3})}\)
25 Sep 2017, 03:03
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If \(y^{3x}=5^x\) and y is a positive number, what is x?
\(y^{3x}=5^x\)
=> \((y^3)^x=5^x\)
=> \(y^3=5\)
=> \(y=5^\frac{1}{3}\)
(1) \(y= \sqrt[3]5\)
=> \(y^3 = 5\)
This is already given in question stem. As no detail about x given.
Insufficient
(2) \(y^x=5^\frac{x}{3}\)
=> \(y^x=(5^\frac{1}{3})^x\)
=> \(y=5^\frac{1}{3}\)
This is already given in question stem. As no detail about x given.
Insufficient
1+2
Here also we don't get any information about x
Answer: E
\(y^{3x}=5^x\)
=> \((y^3)^x=5^x\)
=> \(y^3=5\)
=> \(y=5^\frac{1}{3}\)
(1) \(y= \sqrt[3]5\)
=> \(y^3 = 5\)
This is already given in question stem. As no detail about x given.
Insufficient
(2) \(y^x=5^\frac{x}{3}\)
=> \(y^x=(5^\frac{1}{3})^x\)
=> \(y=5^\frac{1}{3}\)
This is already given in question stem. As no detail about x given.
Insufficient
1+2
Here also we don't get any information about x
Answer: E
sahilsnpt
Joined: 19 Jun 2017
Last visit: 24 Nov 2024
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26 Feb 2018, 10:00
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Nikkb
Why can't we use the information given in the statement 1 and substitute it in the stem "y"??
