求下列函数的定义域: (1)y=x+2+1/x2−x−6; (2)y=(x+1)0|x|−x.

问题描述:

求下列函数的定义域:
(1)y=

x+2
+
1
x2−x−6

(2)y=
(x+1)0
|x|−x

(1)y=x+2+1x2−x−6的定义域满足:x+2≥0x2−x−6≠0,解得x>-2且x≠3.∴y=x+2+1x2−x−6的定义域为(-2,3)∪(3,+∞).(2)y=(x+1)0|x|−x的定义域满足:x+1≠0|x|−x≠0,解得x<0且x≠-1,∴y=(x+1)0|x|...