A.Cách 1: \(E = \left\{ {79;\,\,80;\,\,81;\,\,82;\,\,83;\,\,84;\,\,85} \right\}\)
B.Cách 1: \(E = \left\{ {80;\,\,81;\,\,82;\,\,83;\,\,84;\,\,85} \right\}\)
C.Cách 1: \(E = \left\{ {79;\,\,80;\,\,81;\,\,82;\,\,83;\,\,84} \right\}\)
D.Cách 1: \(E = \left\{ {79;\,\,80;\,\,81;\,\,82;\,\,83;\,\,84;\,\,85} \right\}\)

A.\(A = \left\{ {1;\,\,3;\,\,5;\,\,...;\,\,45} \right\}\) gồm \(23\) (phần tử)
B.\(A = \left\{ {1;\,\,3;\,\,5;\,\,...;\,\,45} \right\}\) gồm \(22\) (phần tử)
C.\(A = \left\{ {1;\,\,3;\,\,5;\,\,...;\,\,45} \right\}\) gồm \(24\) (phần tử)
D.\(A = \left\{ {1;\,\,3;\,\,5;\,\,...;\,\,45} \right\}\) gồm \(25\) (phần tử)

A.\(80\,\,000\,\,000\)
B.\(8\,\,000\,\,000\)
C.\(800\,\,000\)
D.\(80\,\,000\)

A.changed
B.located
C.replaced
D.exchanged

A.
B.
C.
D.

A.
B.
C.
D.

A.
B.
C.
D.

A.
B.
C.
D.

A.
B.
C.
D.

A.
B.
C.
D.