The deleted neighborhood of a is ____.
A. (a – δ, a] i.e. left neighborhood
B. [a, a + δ) i.e. right neighborhood
C. a sphere of radius ‘a’ with the point ‘a’ deleted
D. (a – δ, a + δ) – {a}
Answer:A
The deleted neighborhood of a is ____.
A. (a – δ, a] i.e. left neighborhood B. [a, a + δ) i.e. right neighborhood C. a sphere of radius ‘a’ with the point ‘a’ deleted D. (a – δ, a + δ) – {a}