TỔNG S  C20170 320182  C20171 3201722 C20172 3201623 ...  C2017...

Câu 3: Tổng SC

2017

0

3

2018

2  C

2017

1

3

2017

2

2

C

2017

2

3

2016

2

3

 ...  C

2017

2017

3.2

2018

bằng

A. 5

2017

B. 6.5

2018

C. 6.5

2017

D. 5

2018