T?t C?Công Ngh? L?p 12Công Ngh? L?p 11Công Ngh? L?p 10Công Ngh? L?p 9Công Ngh? L?p 8Công Ngh? L?p 7Công Ngh? L?p 6(commence array l A subset B Leftrightarrow forall x inside of a Rightarrow x in BA notsubset B Leftrightarrow exists x within a Rightarrow x notin Bend array )T?t C?Th? D?c L?p 10Th? D?c L?p 11Th? D?c L?p twelfth? D?c L?p sixth?