Question

[trần huyền xuân]

Tìm A= 7/4.(333/1212+3333/2020+3333/3030+3333/4242) 

Answer 1

[Le Thi Khanh Huyen]

A=7/4.(333/1212+3333/2020+3333/3030+3333/4242) 

=7/4.3333.(1/1212+1/2020+1/4242)

=7/4.3333.(1/12.101+1/20.101+1/42.101)

=7/4.3333.1/101.(1/12+1/20+1/42)

=7/4.33.101.1/101.(1/3.4+1/4.5+1/5.6+1/6.7)

=7/4.33.(1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7)

=7/4.33.(1/3-1/7)

=7/4.33.4/21

=7.33.4/4.21

=11

Answer 2

[Sagittarus]

trời ơi

nhìn phân sô độc 3 là 3

=1347\202