Find the set of interior points for each of these subsets of R (real #s).
(a) (-1, 1)
(b) (-1, 1]
(c) Q (rational #s)
(d) R - Q (irrational #s)
attempted answers:
(a) (-1, 1)
(b) (-1, 1)
(c) R - Q
(d) R - Q
I was just wondering whether or not these answers where correct or not.
Thanks