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IdentifyeachofthefollowingsubsetsoftheEuclideanplaneR2asopensetorclosedset or neither (b) {(:r, y) : l:rl -F lyl < 1}. (c) { (x, y) : lyl) I}.

IdentifyeachofthefollowingsubsetsoftheEuclideanplaneR2asopensetorclosedset or

neither

(b) {(:r, y) : l:rl -F lyl < 1}. (c) { (x, y) : lyl) I}.

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