A、y=x^1/2 B、y=2x^-1/3
B、y=x^1/2 D、y=x^2/3
A、y=x^-1/2 B、y=2x^-1/3
B、y=x^1/2 D、y=x^2/3
A、y=x^-1/2 B、y=2x^-1/3
B、y=x^1/2 D、y=x^2/3
解答:
(1)y=1/x^(1/2)=1/√x, 定义域x>0,不满足
(2)y=2x^(-1/3)=2/[x^(1/3)] 定义域x≠0,不满足
(3)y=x^(1/2)=√x, 定义域x≥0,满足
(4)y=(x²)^(1/3), 定义域x∈R,不满足。
y=1/x^(1/2)=1/√x,是不是√x不等于0
追答还有被开方式非负。