Question

求定义域如图

Answer 1

4-x^2 ≥0
x^2≤4
-2≤x≤2 (1)
x^2-1>0
x<-1 or x>1 (2)
//
y= √(4-x^2)+ln(x^2-1) 的定义域
(1) and (2)
-2≤x≤2 and "x<-1 or x>1"
-2≤x<-1 or 1<x≤2
=[-2, -1) U (1, 2]