Đáp án:
`1/2`
Giải thích các bước giải:
`(2^10 .3^31 +2^40 . 3^6)/(2^11 .3^31 +2^41 .3^6)`
`=(2^10 .3^31 +2^40 . 3^6)/(2.2^10 .3^31 +2.2^40 .3^6)`
`=(1.(2^10 .3^31 +2^40 . 3^6))/(2.(2^10 .3^31 +2^40 .3^6)`
`=1/2 .(2^10 .3^31 +2^40 . 3^6)/(2^10 .3^31 +2^40 .3^6`
`=1/2 .1`
`=1/2`