MathDB
Problems
Contests
National and Regional Contests
USA Contests
MAA AMC
AMC 12/AHSME
1958 AMC 12/AHSME
20
20
Part of
1958 AMC 12/AHSME
Problems
(1)
Evalute an Expression Given an Exponential Equation
Source:
6/13/2009
If 4^x \minus{} 4^{x \minus{} 1} \equal{} 24, then
(
2
x
)
x
(2x)^x
(
2
x
)
x
equals:
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5
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5
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125
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<span class='latex-bold'>(A)</span>\ 5\sqrt{5}\qquad <span class='latex-bold'>(B)</span>\ \sqrt{5}\qquad <span class='latex-bold'>(C)</span>\ 25\sqrt{5}\qquad <span class='latex-bold'>(D)</span>\ 125\qquad <span class='latex-bold'>(E)</span>\ 25
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25