rút gọn B = (1-1/2).(1-1/3).(1-1/4)…(1-1/20) 09/11/2021 Bởi Eden rút gọn B = (1-1/2).(1-1/3).(1-1/4)…(1-1/20)
`B = (1-1/2).(1-1/3).(1-1/4)…(1-1/20)` `B = 1/2 . 2/3 . 3/4…19/20` `B =( 1.2.3…19)/(2.3.4..20)` `B=1/20` Bình luận
Xin hay nhất ạ ^_^
`B = (1-1/2).(1-1/3).(1-1/4)…(1-1/20)`
`B = 1/2 . 2/3 . 3/4…19/20`
`B =( 1.2.3…19)/(2.3.4..20)`
`B=1/20`