(related functions) Given the set a = {Y / y = x Square-1, X contained in R}, B = {X / y = root 2X-4}, then the intersection of a and B = -, the union of a and B=—— The result is {X / X is greater than or equal to 2}, and the next lattice is {X / X is greater than or equal to - 1}

(related functions) Given the set a = {Y / y = x Square-1, X contained in R}, B = {X / y = root 2X-4}, then the intersection of a and B = -, the union of a and B=—— The result is {X / X is greater than or equal to 2}, and the next lattice is {X / X is greater than or equal to - 1}

1.y=x^2-1
In essence, y ≥ - 1
And y = √ 2X-4
2x-4=y^2
x=y^2/2+2≥2
therefore
A∩B={a|a≥2
A∪B={a|a≥-1}