电子课本网 第15页

第15页

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​$=\frac 1{3\sqrt 2}$​
​$=\frac {\sqrt 2}6$​
​$=\sqrt {\frac {3}{2}}$​
​$=\frac {\sqrt {6}}{2}$​
​$=\sqrt {\frac {14}{3}}$​
​$=\frac {\sqrt {42}}3$​
​$ =\frac {\sqrt 5}{\sqrt {2a}}$​
​$=\frac {\sqrt {10a}}{2a}$​
​$ =\frac {\sqrt {9x}}{\sqrt {64y^2}}$​
​$=\frac {3\sqrt x}{8|y|}$​
​$=\frac {\sqrt {64b^2}}{\sqrt {9a^2}}$​
​$=\frac {8|b|}{3|a|}$​
​$=\frac {\sqrt {5x}}{\sqrt {169y^2}}$​
​$=\frac {\sqrt {5x}}{13|y|}$​
​$=\frac {\sqrt {5(a-b)}}{3\sqrt {3(a+b)}}$​
​$=\frac {\sqrt {15(a^2-b^2)}}{9(a+b)}$​
​$=\frac {\sqrt 5}5$​
​$=\frac {\sqrt {11}×\sqrt 3}{\sqrt 3×\sqrt 3}$​
​$=\frac {\sqrt {33}}3$​
​$=\frac 1{4\sqrt 2}$​
​$=\frac {\sqrt 2}8$​
​$=\frac {\sqrt 5×\sqrt 2}{2\sqrt 5}$​
​$=\frac {\sqrt 2}2$​
​$=\frac {\sqrt 2×\sqrt 3}{2\sqrt 3×\sqrt 3}$​
​$=\frac {\sqrt 6}6$​
​$=\frac 2{3\sqrt 2}$​
​$=\frac {\sqrt 2}3$​
​$=\frac {3×\sqrt {6x}}{\sqrt {6x}×\sqrt {6x}}$​
​$=\frac {\sqrt {6x}}{2x}$​
​$=\frac {x×\sqrt {5y}}{\sqrt {5y}×\sqrt {5y}}$​
​$=\frac {x\sqrt {5y}}{5y}$​
​$=\frac {2×\sqrt {2b}}{a\sqrt {2b}×\sqrt {2b}}$​
​$=\frac {\sqrt {2b}}{ab}$​
​$ =\frac {3×\sqrt y}{x\sqrt y×\sqrt y}$​
​$=\frac {3\sqrt y}{xy}$​