Đáp án:
`(1/243)^9>(1/83)^13`.
Giải thích các bước giải:
`(1/243)^9=(1/3)^45=1/3^45`
`=>(1/83)^13<(1/81)^13`
`=>(1/81)^13=(1/3)^52=1/3^52`
`=>3^45<3^52=>1/3^45>1/3^52`
`=>(1/243)^9>(1/81)^13>(1/83)^13`
`=>(1/243)^9>(1/83)^13`
Vậy `(1/243)^9>(1/83)^13`.