trục căn thức:
a,\(\dfrac{a-1}{\sqrt{ }a-1}\)
b,\(\dfrac{a-b}{\sqrt{ }a-\sqrt{ }b}\)
c,\(\dfrac{a+4\sqrt{a+4}}{\sqrt{ }a+2}\)
d,\(\dfrac{a+b-2\sqrt{ab}}{\sqrt{ }a-\sqrt{ }b}\)
e,\(\dfrac{1+a\sqrt{a}}{1+\sqrt{ }a}\)
f,\(\dfrac{1-a\sqrt{a}}{1-\sqrt{ }a}\)
g,\(\dfrac{a\sqrt{a+b\sqrt{b}}}{\sqrt{ }a+\sqrt{ }b}\)
h,\(\dfrac{a\sqrt{a}-b\sqrt{b}}{\sqrt{a}-\sqrt{ }b}\)
i,\(\dfrac{1-\sqrt{a}}{1+\sqrt{ }a}\)
k,\(\dfrac{\sqrt{x+}\sqrt{y}}{\sqrt{ }x-\sqrt{ }y}\)
l,\(\dfrac{\sqrt{a}+1}{\sqrt{ }a-1}\)
m,\(\dfrac{1 }{\sqrt{ }3+\sqrt{ }2+1}\)
n,\(\dfrac{2\sqrt{3}}{\sqrt{ }2+\sqrt{ }3+\sqrt{ }5}\)
v,\(\dfrac{\sqrt{6}}{3+\sqrt{ }2-\sqrt{ }3}\)
r,\(\dfrac{2\sqrt{3}}{\sqrt{ }5+\sqrt{ }6+\sqrt{ }7}\)
s,\(\dfrac{1}{2+\sqrt{ }3+\sqrt{ }6}\)