C20182017+C20182018A
Câu 27 :
Tính tổng:
S
=
2 .
2018
C
2018
0
−
2 .
2017
C
1
2018
+
2 .
2016
C
2018
2
− −
... 2.
C
2018
2017
+
C
2018
2018
A.
S
=
2
2018
−
1
B.
S
=
3
2018
C.
S
= −
1
D.
S
=
1
Câu 27 :
Tính tổng:
S
=
2 .
2018
C
2018
0
−
2 .
2017
C
1
2018
+
2 .
2016
C
2018
2
− −
... 2.
C
2018
2017
+
C
2018
2018
A.
S
=
2
2018
−
1
B.
S
=
3
2018
C.
S
= −
1
D.
S
=
1