Two sets explore how to find the intersection of different elements If a = {X / y = - X & sup2; + 2} B = {Y / y = x & sup2; - 1}, then a ∩ B=_______ The set of a and B is______ But the elements of the two sets are different, one is x and the other is y. I remember that the direct intersection is empty | Math enthusiast | Mathematical art

Two sets explore how to find the intersection of different elements If a = {X / y = - X & sup2; + 2} B = {Y / y = x & sup2; - 1}, then a ∩ B=_ The set of a and B is But the elements of the two sets are different, one is x and the other is y. I remember that the direct intersection is empty

The exploration element is just a symbol. In order to express the characteristics of the elements contained in the set, that is to say, the exploration element is any element in geometry, which is similar to using letters to express constants. It has no practical significance. In the question, the solution of a set is {x | x ∈ r} and B is {y | Y > = - 1}

Set a = {x | - 1

∵.-1

Let u = R. a = {x | x less than or equal to 1 or x greater than or equal to 3}, B = {x | K}

The complement of set a is {x | 1

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