TỔNG C12018 C22018C32018... C 20182018 BẰNG
Câu 1: Tổng C
1
2018
C2
2018
C3
2018
... C2018
2018
bằng :A.2
2018
B.2
2018
1
C.2
2018
1
D.4
2018
3
y
x
2
1
x
1
2018
C2
2018
C3
2018
... C2018
2018
bằng :A.2
2018
B.2
2018
1
C.2
2018
1
D.4
2018
3
y
x
2
1
x