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Let A is the subset of R given as , Then which one is incorrect for the set A?
  • a)
    A is open set.
  • b)
    A is connected set
  • c)
    A has four boundary points
  • d)
    A has no isolated points
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Let A is the subset of R given as, Then which one is incorrect for the...



here A is the union of three open intervals. Hence A is open, since a not an interval ⇒ A not connected.
Clearly set of boundary points of is  and also A has no isolated points.
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Let A is the subset of R given as, Then which one is incorrect for the...



here A is the union of three open intervals. Hence A is open, since a not an interval ⇒ A not connected.
Clearly set of boundary points of is  and also A has no isolated points.
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Let A is the subset of R given as, Then which one is incorrect for the set A?a)A is open set.b)A is connected setc)A has four boundary pointsd)A has no isolated pointsCorrect answer is option 'B'. Can you explain this answer?
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