1958 AHSME Problems/Problem 20

Problem

If $4^x - 4^{x - 1} = 24$ , then $(2x)^x$ equals:

$\textbf{(A)}\ 5\sqrt{5}\qquad \textbf{(B)}\ \sqrt{5}\qquad \textbf{(C)}\ 25\sqrt{5}\qquad \textbf{(D)}\ 125\qquad \textbf{(E)}\ 25$

We could rewrite $4ˆx - 4ˆ(x-1) = 24$ (Error compiling LaTeX. Unknown error_msg) as $$ (Error compiling LaTeX. Unknown error_msg)\fbox{}$

1958 AHSC (Problems • Answer Key • Resources)
Preceded by Problem 19	Followed by Problem 21
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