f If x is not an isolated point of S then x is an accumulation point of S TRUE

F if x is not an isolated point of s then x is an

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(f) Ifxis not an isolated point ofS,thenxis an accumulation point ofS. (g) Ifα= supS,thenαis an accumulation point ofS. 3
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3. For each of the following sets, give the interior points, the boundary points, theaccumulation points and the isolated points.(a)S= (-2,1)[0,3)[3,10)S= (-2,10) :intS= (-2,10),bdS={-2,10},Sprime= [-2,10],no isolated points.(b)S=([0,2)(1,3])∪ {-1} ∪ {5}S= (1,2)∪ {-1} ∪ {5}:intS= (1,2),bdS={-1,1,2,5},Sprime=[1,2],isolated points{-1,5}.(c)S={rQ|0< r < 4
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