!"#$%&' I/ ()*" +, / !"#$%&'()"*+, #/01223242,5.6.#/07 ∈ 897:,5 ;.#/0<21223242,5=.#/0<21223245 /;!">/0,2?2@2AA 2115. !">B$%CD ,E6.,@ ;.F<=.;-G6G;H+$ 0/;!"I/07 ∈ 893:7:?5.;J$+KL12" 34" M 042,2F5 ∈ I 6., ∈ I;.0F5 ⊂ I=.I ⊂ 042,2F5 5/J*+NOP F Q 3 3 6.F;. =.,F 6/;7Q1 ∈ 67Q1 ∈ R1<.BSN7 7 ∈ 0321156.7 ∈ 0,2F5;.7 ∈ 032@5=.)BS .;T/,U3?<,U@<U77 ∈ 8.VH+(WN7T M , 7/,(( ∈ 86.7/,(U1( ∈ 8 ;.7/,(U3( ∈ 8 =.7/,(U4( ∈ 8 7.;XY Khẳng định nào sau đây đúng? >8Z(P%I6.>IZ[P%8 ;.8IZ[P%>=.IZ>8 8.;XY Khẳng định nào sau đây không đúng? >8>L[+6. >88>%+ ;. >7>8%+=. >78L()%+ 9:.;" E 3<,'# &WOP 401@,\34,Q4,U3,.3]5 ^ 3 .1,Q\1<Q1,QE ] =63<,'# X$%&'7^J F<7Q,/,. ^ L7GL^Z$%P"7?L_J,G_J @. 03<,' ;`+ab7L.cY-6+a`76Z -`$`6/G6-/3.cY;+a`L.deL(' ;[6;. 1 . M . N . P . M . N Y X ^;%N`L. Pafgb`-M 5=63<,'# X$%+L'%7E M 7U1 ^;>/@ <14 U1@ <14 U@ <14 U3@ <14 U U<@ <14 U1@ <14 dh>B$%P()McX$M >?>"=@<.3<, ()*" +,3' AB34" 3CD*%/63 1Q;Q63Q-4Q=,Q-FQ-?Q;EQ6 9:.;"83' #3' &WOPAB34" 3CD*3' 401@,\34,Q4,U3,.3]5 /401@,\34,Q4,U1<,]5<., /401@,\34,Q1,<]<., /401@,1@,5<., /1<., ^ 3 .1,Q\1<Q1,QE ] /E.1,Q\1<Q? ]<., /1<Q\1<Q4@]<., /1<Q?1<., /4@<., #=63' X$%&'7^J34" 3CD*3' F<7Q,/,. F<7Q,/< 7Q,/F<< 7Q,/3 7/3U, 7/E 7/E 7/4 ^34" 3CD*=63' V7?LJ,XL/<iL/,<., Q8J+L/<B7?<G7?<J@X@U7J@. j+L7/<G7/@<., Q8J+L/,B7?,G7?,J@X14U7J@. j+L7/4<., c!L$%CX<?<G@?<G4?,<., 2 03' dXY"<., k k kk ;[6;6`G6L<., ^;%N`L`6G`-G`7<.?, cX6Z`-' `6U6-/`-<G, LU3/`- `-/,<G, 5/63' !34" *E3<,>l"<G, VE M 7U1X7U1 ∈ 012242E5 U8J+7U1/1$+L7/<g U8J+7U1/$+L7/1g U8J+7U1/4$+L7/3he U8J+7U1/E$+L7/?he c!L7/3G7/? ^ @34" *E%=63<, Q mL>B1@Q@1<U1/$%g cXl$%gB$%![1'>B![. 1/ . =B>B![<G, QngB$%P()B$%![ c!L>/@ <14 U1@ <14 U@ <14 U3@ <14 U U<@ <14 U1@ <14 ()$% P.<G, 3 F G H . 0/;!" I /07 ∈ 893:7:?5.;J$+KL12" 34" M 042,2F5 ∈ I 6., ∈ I ;.0F5 ⊂ I =. I ⊂ 042,2F5 5/J*+NOP F Q 3 . đây đúng? >8Z(P% I 6.> I Z[P%8 ;.8 I Z[P%>=. I Z>8 8.;XY Khẳng. !"#$%&' I/ ()*" +, /