The Radical Sign

The radical sign $\sqrt{}$ refers to the “square root function” i.e. $\sqrt{x}=x^{\frac{1}{2}}$ . You should remember:

Consider this GRE Quant practice question of the day:

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Remember the radical sign always indicates the positive square root of a number.

Quantity A	Quantity B
$\sqrt{y^{24}}$	$y^3 \times y^4 \times y^5$

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