Question

tính:

A=(1-1/2).(1-1/3).(1-1/4). ....(1-1/2000)

B=(1+1/2).(1+1/3).(1+1/4). ....(1+1/2000)

Answer 1

=1/2 . 2/3 ....1999/2000

=1.2....1999/2.3...2000

1/2000

Answer 2

 

B= 3/2.4/3. ....2001/2000

B = 3.4....2001/2.3....2000

B =2001/2

Answer 3

ko

Answer 4

=1/2 . 2/3 ....1999/2000

=1.2....1999/2.3...2000

1/2000

Answer 5

Mà bươi

 

Answer 6

có thật là mẫu giáo KO ?