Let R be set of points inside a rectangle of sides a and b (a, b > 1) with two sides along the positive direction of x-axis and y-axis. Then
Given: R be set of points inside a rectangle of sides a and b
Since, a, b > 1
a and b cannot be equal to 0
Therefore, R = {(x, y) : 0 < x < a, 0 < y < b}
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