grandes-ecoles 2015 QI.A.2

grandes-ecoles · France · centrale-maths2__psi Proof True/False Justification
Does this result hold if the set $\Omega$ has infinitely many elements but is not assumed to be open? 
Does this result hold if the set $\Omega$ has infinitely many elements but is not assumed to be open?
Paper Questions
QI.A.1 QI.A.2 QI.B.1 QI.B.2 QI.B.3 QI.C.1 QI.C.2 QII.A QII.B.1 QII.B.2 QII.B.3 QII.C.1 QII.C.2 QII.D.1 QII.D.2 QII.D.3 QII.D.4 QIII.A.1 QIII.A.2 QIII.A.3 QIII.B.1 QIII.B.2 QIII.B.3 QIII.C QIV.A.1 QIV.A.2 QIV.A.3 QIV.A.4 QIV.B.1 QIV.B.2 QIV.B.3 QIV.C.1 QIV.C.2