Question

kết quả của biểu thức:

3/6 + 3/12 + 3/20 + 3/30 + 3/42 + 3/56 + 3/72 là:

A. 15/18

B. 7/6

C. 21/6

D. 14/18

Answer 1

B

Answer 2

B

Answer 3

B

Answer 4

B

Answer 5

B

Answer 6

B

Answer 7

B

Answer 8

B

Answer 9

B

Answer 10

b

Answer 11

B

Answer 12

B

Answer 13

B

Answer 14

B

Answer 15

B. 7/6

Answer 16

B

Answer 17

B

 

Answer 18

Khoanh B