1980 AHSME Problems/Problem 6

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Problem

A positive number $x$ satisfies the inequality $\sqrt{x} < 2x$ if and only if $\text{(A)} \ x > \frac{1}{4} \qquad \text{(B)} \ x > 2 \qquad \text{(C)} \x > 4 \qquad \text{(D)} \ x < \frac{1}{4}\qquad \text{(E)} \x < 4$ (Error compiling LaTeX. Unknown error_msg)