Please show us what you have tried and exactly where you are stuck.A = {(x,y) ∈R2 : y^2 < x < 1}
What are the boundry points of this set? Does y^2 = x and 0≤x≤1 cover it?
That sounds like you have the right idea, but you'll need to define this set more precisely. You don't mean every point where y^2 = x together with every point where 0≤x≤1, right? Nor (I hope) do you mean the intersection of those sets.A = {(x,y) ∈R2 : y^2 < x < 1}
What are the boundry points of this set? Does y^2 = x and 0≤x≤1 cover it?