Mathematics · Topology
Let X = {a, b, c, d, e} and a topology T = {X, ∅, {a}, {a, b}, {a, b, c}, {a, b, c, d}}. Then the derived set of the subset {b, c, d} is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1{a, b, d}
- 2{e, c, d}
- 3{b, c, d, e}✓
- 4{a, e}
Correct answer
{b, c, d, e}
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