Toán học
... = +7, 2 2 1 1 4( 20 05)x x x khốiD+ + + + = 8, 2 1 2 1 2( 20 00)x x x x BCVT+ = 9, 3 (2 2) 2 6( 01)x x x HVKTQS+ = + + 10, 2 2 2 8 6 1 2 2( 20 00)x x x x BK+ + + = + 11, 2 2 2 25 51 ... Đô 20 00) 2 x xx DL ngx+ += + 29 ,3 3 2 1 1 2( 95)1 2 2xGTx x+ + = +30, 2 2 2 1xxx+ =31, 2 21 1 (1 2 1 )x x x+ = + 32, 2 2(4 1) 1 2 2 1(Đ 78)x x x x ề + = + + 33, 2 23 ... +19, 2 23 3 3 6 3( 98)x x x x TM + + + = 20 , 2 3 2 5 1 7 1x x x+ = 21 , 2 3 2 4 3 4x x x x+ + = + 22 , 2 23 2 1( 99)x x x x NT + + = 23 ,1 4 ( 1)(4 )( 20 001)x x x x NN+ + + + 24 , 2 24...