Y=√ln(x²-3)
{ln(x²-3)≥0
{x²-3>0
ln(x²-3)≥0
ln(x²-3)≥ln1
x²-3≥1
x²-3-1≥0
x²-4≥0
(x-2)(x+2)≥0
x=2 x=-2
+ - +
------- -2 ------------ 2 -------------
\\\\\\\ \\\\\\\\\\\\
x∈(-∞; -2]U[2; +∞)
x²-3>0
(x-√3)(x+√3)>0
x=√3 x=-√3
+ - +
---------- -√3 -------------- √3 ------------
\\\\\\\\\ \\\\\\\\\\\\\\\
x∈(-∞; -√3)U(√3; +∞)
х∈(-∞; -2]U[2; +∞)
D(y)=(-∞; -2]U[2; +∞) - область определения функции.