CHO A  C20190 22019 3.22018. C20191  3 .22 2017. C20192  ... 3 ...

Câu 7: Cho AC

2019

0

2

2019

 3.2

2018

. C

2019

1

 3 .2

2

2017

. C

2019

2

 ... 3 

2019

C

2019

2019

. Vậy A bằng

A. 6

2019

. B. 5

2019

. C. 2019 . D. 3

2019

.