Câu 1: !" # $ ω t%&'( ω )*+,) ω - ./0" 12-3$45 A. " ! " 6 7 6 − B. " ! " 8 − C. " ! " 6 7 6 − D. " ! " 8 − Câu 2:,9-:9 9:;<$=>?<@ AB C;<)DAB(9/E<:$E<1C: ,FE<E<*+*1G>4H<=9*@<ICJ-K*@<ICJ: L<1;<$=C9<1*M$C!N@*@<ICJ:7# L<9<M$C!ON@*@<ICJ:7O#L<9<PQ/$A@/ E<<*RH/A>4HABM:@*@<ICJ:- 2GL<9</S<T:J/G>4H1<C->U</G >4H1;L< A.VOB.7#C.W8D.XX 1. Câu 3:Y? #7 OCC = # XCC = ZD29?(:$=9<[!X&- ?/\<Z/(9>4H>9<FA>M>U< /<>9<AN<*RZAB? YA/G9>4B >9<$:1 A. O V B. O V C. O V ]D. X V