Tính
\(\frac{\sqrt{4+2\sqrt{3}}+2}{4+2\sqrt{3}-2\sqrt{4+2\sqrt{3}}}\)
Tính
a) \(\dfrac{1}{3\sqrt{2}-2\sqrt{3}}-\dfrac{1}{2\sqrt{3}+3\sqrt{2}}\)
b) \(\dfrac{4\sqrt{3}-8}{2\sqrt{3}-4}-\dfrac{1}{\sqrt{5}-2}\)
Tính A = ( \(\dfrac{4-2\sqrt{5}}{\sqrt{3}-1}\))\(^2\) - (\(\dfrac{4+2\sqrt{3}}{\sqrt{3}+1}\))\(^2\)
thực hiện phép tính:
\(\left(\sqrt{4+2\sqrt{3}}-\sqrt{4-2\sqrt{3}}\right)\left(\sqrt{4-2\sqrt{3}}+\sqrt{4+2\sqrt{3}}\right)\) (3 cách)
Tính A = \(\frac{2+\sqrt{3}}{2+\sqrt{4+2\sqrt{3}}}+\frac{2-\sqrt{3}}{2-\sqrt{4-2\sqrt{3}}}\)
Thực hiện từng bước của phép tính:
1.\(\left(\sqrt{2}+1\right)^3-\left(\sqrt{2}-1\right)^3\)
2.\(\sqrt{4-\sqrt{15}}+\sqrt{4+\sqrt{15}}-2\sqrt{3-\sqrt{5}}\)
3.\(\dfrac{10+2\sqrt{10}}{\sqrt{5}+\sqrt{2}}+\dfrac{8}{1-\sqrt{5}}\)
4.\(\sqrt{\dfrac{2-\sqrt{3}}{2+\sqrt{3}}}+\sqrt{\dfrac{2+\sqrt{3}}{2-\sqrt{3}}}\)
tính E=\(\frac{2+\sqrt{3}}{2+\sqrt{4+2\sqrt{3}}}\)+\(\frac{2-\sqrt{3}}{2-\sqrt{4-2\sqrt{3}}}\)
Tính : \(\sqrt{6+2\sqrt{3}\sqrt{3-\sqrt{4+2\sqrt{3}}}}\)
Tính tổng:
\(S=\dfrac{1}{2\sqrt{1}+1\sqrt{2}}+\dfrac{1}{3\sqrt{2}+2\sqrt{3}}+\dfrac{1}{4\sqrt{3}+3\sqrt{4}}+...+\dfrac{1}{121\sqrt{120}+120\sqrt{121}}\)
Tính :
A=\(\frac{2+\sqrt{3}}{2+\sqrt{4+2\sqrt{3}}}\)+\(\frac{2-\sqrt{3}}{2-\sqrt{4-2\sqrt{3}}}\)