B= \(\frac{3-2\sqrt{2}}{\sqrt{\left(3-2\sqrt{2}\right)^2}}-\frac{3+2\sqrt{2}}{\sqrt{\left(3+2\sqrt{2}\right)^2}}=\frac{3-2\sqrt{2}}{3-2\sqrt{2}}-\frac{3+2\sqrt{2}}{3+2\sqrt{2}}=\) \(1-1=0\)
Chứng minh: A\(\in\)Z và B\(\in\)Z với
A=\(\sqrt{6-2\sqrt{5}}\)\(-\)\(\sqrt{6+2\sqrt{5}}\)
B=\(\frac{\sqrt{3-2\sqrt{2}}}{\sqrt{17-12\sqrt{2}}}\)\(-\)\(\frac{\sqrt{3+2\sqrt{2}}}{\sqrt{17+12\sqrt{2}}}\)
CM A thuoc Z va B thuoc Z voi :
A = \(\sqrt{6-2\sqrt{5}}-\sqrt{6+2\sqrt{5}}\)
B = \(\frac{\sqrt{3-2\sqrt{2}}}{\sqrt{17-12\sqrt{2}}}-\frac{\sqrt{3+2\sqrt{2}}}{\sqrt{17+12\sqrt{2}}}\)
\(\frac{\sqrt{3-2\sqrt{2}}}{\sqrt{17-12\sqrt{2}}}-\frac{\sqrt{3+2\sqrt{2}}}{\sqrt{17+12\sqrt{2}}}\)
\(\frac{\sqrt{3-2\sqrt{2}}}{\sqrt{17-12\sqrt{2}}}-\frac{\sqrt{3+2\sqrt{2}}}{\sqrt{17+12\sqrt{2}}}\)
Tính \(\frac{\sqrt{3}-2\sqrt{2}}{\sqrt{17}-12\sqrt{2}}-\frac{\sqrt{3+2\sqrt{2}}}{\sqrt{17+12\sqrt{2}}}\)
\(\frac{\sqrt{3-2\sqrt{2}}}{\sqrt{17-12\sqrt{2}}}-\frac{\sqrt{3+2\sqrt{2}}}{\sqrt{17+12\sqrt{2}}}\)
\(\frac{\sqrt{3-2\sqrt{2}}}{\sqrt{17-12\sqrt{2}}}-\frac{\sqrt{3+2\sqrt{2}}}{\sqrt{17}-12\sqrt{2}}\)
Tính
tính A=\(\left(\sqrt{4+\sqrt{7}}-\sqrt{4-\sqrt{7}}\right)^3\)
B=\(\sqrt{\frac{3-2\sqrt{2}}{17-12\sqrt{2}}}-\sqrt{\frac{3+2\sqrt{2}}{17+12\sqrt{2}}}\)
khai phương một tích \(\frac{\sqrt{3-2\sqrt{2}}}{\sqrt{7-12\sqrt{2}}}-\frac{\sqrt{3+2\sqrt{2}}}{\sqrt{17+12\sqrt{2}}}\)
