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第104頁

信息發(fā)布者：

B

$解:原式?=\frac {\sqrt{2}}{\sqrt{5}}?$

$? =\frac {\sqrt{10}}5?$

$解：原式?=\sqrt{\frac 87}?$

$? =\frac {2\sqrt{14}}7?$

$解:原式?=\sqrt{32×\frac {1}{3}}?$

$?=\sqrt{3}$

$解：原式?=\frac {\sqrt}{\sqrt{2a}}?$

$? =\frac {\sqrt{2ab}}{2a}?$

$解:原式?=\frac {\sqrt{7}×\sqrt{2}}{\sqrt{2}×\sqrt{2}}?$

$? =\frac {\sqrt{14}}2?$

$解:原式?=\frac {2}{3\sqrt{2}}?$

$?=\frac {\sqrt{2}}{3}?$

$解：原式?=\frac {3×\sqrt{6x}}{\sqrt{6x}×\sqrt{6x}}?$

$? =\frac {\sqrt{6x}}{2x}?$

$解：原式?=\frac {2×\sqrt{2b}}{a×\sqrt{2b}×\sqrt{2b}}?$

$? =\frac {\sqrt{2b}}{ab}?$

?D

$解:原式?=\sqrt{\frac {4}{3}}?$

$?=\frac {2\sqrt{3}}{3}?$

$解:原式?=9×\frac {\sqrt{2}}{\sqrt{3}}?$

$?=3\sqrt{6}?$

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