Toan11L123

======Toan11L2=========
1)
 a/ -3/2          b/ 3            c/ -1/2
2)
 a/ 2             b/ 4/2019       c/ 2
3)
 a/ -1/căn2       b/ -2           c/ -1/2
4)
 a/ 3             b/ 3            c/ 0
5)
 a/ - vô cùng     b/ - vô cùng    c/ + vô cùng
6)
 a/15             b/3/5           c/0
7)
 a/ + vô cùng     b/ 3            c/0

======Toan11L3=========
1B 2A 3D 4B 5A 6D 7A 8B 9B 10C 11B 12A 13A 14D 15D 16A 17C 18D 19A 20D

======Toan11L4=========
1C 2D 3D 4D 5D 6A 7 8 9 10 11B 12A 13 14B 15 16C 17C 18 19 20