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27 Sep 2021, 07:45
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C
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:
70% (02:16) correct
30%
(02:21)
wrong
based on 464
sessions
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Date
Time
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Not Attempted Yet
Find the value of y given that \(\frac{4^{y^2}}{64}=2^{-y}\) and \(y < |y|\)
A. -4
B. -3
C. -2
D. -1
E. 2
A. -4
B. -3
C. -2
D. -1
E. 2
27 Sep 2021, 09:31
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Bunuel
Find the value of y given that \(\frac{4^{y^2}}{64}=2^{-y}\) and \(y < |y|\)
A. -4
B. -3
C. -2
D. -1
E. 2
A. -4
B. -3
C. -2
D. -1
E. 2
\(\frac{2^{2y^2}}{2^6} = 2^{-y}\)
\(2y^2 - 6 = -y\)
\(2y^2 + 4y - 3y - 6 = 0\)
\(2y(y + 2) - 3(y + 2) = 0\)
y = \(\frac{3}{2}\); y = -2
Since, y < |y| y = -2
IMO, (C)!
03 Nov 2021, 07:56
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Bunuel
Find the value of y given that \(\frac{4^{y^2}}{64}=2^{-y}\) and \(y < |y|\)
A. -4
B. -3
C. -2
D. -1
E. 2
A. -4
B. -3
C. -2
D. -1
E. 2
This question is a part of Are You Up For the Challenge: 700 Level Questions collection.
