求函数定义域:y=8^1/2x-1; y=根号下1-(1/2)^2

问题描述:

求函数定义域:y=8^1/2x-1; y=根号下1-(1/2)^2
(1)y=8^1/2x-1; (1) y=根号下1-(1/2)^2

(1)y=8^(1/2x-1)
x≠0
即(-∞,0)U(0,+∞)
(2) y=根号下1-(1/2)x^2
1-(1/2)x^2>=0
1>=(1/2)x^2
x^2