The R1 = {(x, y) | R x R | x ^ 2 + y ^ 2 = -1}, R2 = {(x, y) R x R | x ^ 2 + 2y = - 4} Question. accurate
1: graph of the relationship of R2 R1 with two contrasting points
2: Graph relation R1 can not draw on the plane real number
3: graph of the relationship R2 can not be drawn on the plane of reality
4: All of the above.
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