Question: Determine whether each set is open or closed or neither open nor closed. a. {(x, y): x + y = 1} b. {(x, y): x

Determine whether each set is open or closed or neither open nor closed.


a. {(x, y): x + y = 1} b. {(x, y): x

a. {(x, y): x + y = 1} b. {(x, y): x + y > 1} c. {(x, y): x + y 1 and y>0} d. {(x, y): y x} {(x, y): y < x} e.

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