Let X = {a, b, c, d} and T = { X, þ, {a,b},{a,b,c}}, then *An open proper subset of X may beclopen and may be not.O None of the choicesEvery open subset of X is clopenAn open proper subset of X cannotbe clopenO O O

Given that the set X = { a,b,c}

Let X = {a, b, c, d} and T = { X, þ, {a,b}, {a,b,c}}, then * An open proper subset of X may be clopen and may be not. None of the choices O Every open subset of X is clopen An open proper subset of X cannot be clopen O O O

Let X = {a, b, c, d} and T = { X, þ, {a,b}, {a,b,c}}, then * An open proper subset of X may be clopen and may be not. None of the choices O Every open subset of X is clopen An open proper subset of X cannot be clopen O O O

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Question

Let X = {a, b, c, d} and T = { X, þ, {a,b},
{a,b,c}}, then *
An open proper subset of X may be
clopen and may be not.
O None of the choices
Every open subset of X is clopen
An open proper subset of X cannot
be clopen
O O O

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