“微信扫一扫”进入题库练习及模拟考试
将二次根式化为最简结果:\(\frac{{\sqrt 8 }}{{\sqrt {3{a^2}b} }}\)。
参考答案:当\(a \geqslant 0\)时\(\frac{{\sqrt 8 }}{{\sqrt {3{a^2}b} }} = \frac{{2\sqrt {6b} }}{{3ab}}\);
当\(a < 0\)时\(\frac{{\sqrt 8 }}{{\sqrt {3{a^2}b} }} = - \frac{{2\sqrt {6b} }}{{3ab}}\)