Question

求下列各函数的反函数y=-√x-1(x≥1)y=x^2-2x(x

Answer 1

1.x=-√y-1

x^2=y-1

y=x^2+1

2.x=y^2-2y

x+1=y^2-2y+1

y-1=√x+1

y=√(x+1)-1