求定义域
f(x)=[(x-2)/lnx]+(√16-x²)
f(x)=[ln(x+1)]/(√x²+3x-4)
f(x)=(√-x²-3x+4)/x
f(x)=(√x-1)+(x-1)/(√x-1)
求值域
y=-x²+2x(0<=x<=3)
求定义域
f(x)=[(x-2)/lnx]+(√16-x²)
f(x)=[ln(x+1)]/(√x²+3x-4)
f(x)=(√-x²-3x+4)/x
f(x)=(√x-1)+(x-1)/(√x-1)
求值域
y=-x²+2x(0<=x<=3)
(1){x| x<>1 0<x<=4}
(2){x|x>1}
(3){x||-4<=x<=1 ,x<>0}
(4){x|x>0,x<>1}
(5) -3<=y<=1
满意了要采纳啊!呵呵