Đáp án:
`(51.52.53.....100)/(1.3.5.....99)`
`= ((2.4.6...100).(51.52.53.....100))/((2.4.6...100).((1.3.5.....99))`
`= ((2.4.6...100).(51.52.53.....100))/(1.2.3.4.5....100)`
`= (2.4.6...100)/(1.2.3.4....50)`
`= (2.1.2.2.2.3.2.4.2.5.2..6...2.50)/(1.2.3.4.5..50)`
`= (2^(50) . (1.2.3...50))/1 = 2^50`
`Go od luck!`