求以下定义域(1)y=√x²-4x+3 (2)y=㏒1/2(5x-2x²-2)
问题描述:
求以下定义域(1)y=√x²-4x+3 (2)y=㏒1/2(5x-2x²-2)
答
(1)y=√x²-4x+3
x²-4x+3>=0
(x-1)(x-3)>=0
x=3
(2)y=㏒1/2(5x-2x²-2)
5x-2x²-2>=0
2x²-5x+2