Question

Tính giá trị các biểu thức sau:

a) \(\sqrt[4]{{\frac{1}{{16}}}}\);  

b) \({\left( {\sqrt[6]{8}} \right)^2}\);         

c) \(\sqrt[4]{3}.\sqrt[4]{{27}}\).

Answer 1

a) \(\sqrt[4]{\dfrac{1}{16}}=\dfrac{1}{2}\)

b) \(\left(\sqrt[6]{8}\right)^2=\sqrt[\dfrac{6}{2}]{8}=\sqrt[3]{8}=2\)

c) \(\sqrt[4]{3}\cdot\sqrt[4]{27}=\sqrt[4]{3\cdot27}=\sqrt[4]{81}=3\)