TỔNG S =32020C20200 −32019C20201 +32018C20202 − +... 30C202020...
Câu 29. Tổng
S
=
3
2020
C
2020
0
−
3
2019
C
2020
1
+
3
2018
C
2020
2
− +
... 3
0
C
2020
2020
bằng A. 4 .2020
B. −2 .2020
C. 2 .2020
D. −4 .2020
S
=
3
2020
C
2020
0
−
3
2019
C
2020
1
+
3
2018
C
2020
2
− +
... 3
0
C
2020
2020
bằng A. 4 .2020
B. −2 .2020
C. 2 .2020
D. −4 .2020