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2x

by shibal » Sat May 16, 2009 12:29 pm
if x is a positive number and 1/2the sq.root of x is equal to 2x, then x is equal to?

OA [spoiler]1/16[/spoiler]
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by truplayer256 » Sat May 16, 2009 12:33 pm
sqrt(x)/2=2x
sqrt(x)=4x
Divide both sides by sqrt(x)
4sqrt(x)=1
sqrt(x)=1/4
Square both sides.
x=(1/4)^(2)=1/16
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