Đáp án :
`m∈{-8; -2; 0; 2; 4; 10}` thì `m-1` là ước của `-9`
Giải thích các bước giải :
`m-1` là ước của `-9``=>m-1∈Ư(-9)``Ư(-9)={-9; -3; -1; 1; 3; 9}``=>m-1 ∈ {-9; -3; -1; 1; 3; 9}``=>m∈{-8; -2; 0; 2; 4; 10}`Vậy : `m∈{-8; -2; 0; 2; 4; 10}` thì `m-1` là ước của `-9`
Đáp án:
`↓↓↓`
Giải thích các bước giải:
giải
ta có `m-1∈Ư(-9)`
`=>` `Ư(-9)` `=` `{1;-1;3;-3;9;-9}`
vậy `m-1` `=` `{1;-1;3;-3;9;-9}`
`=>` `m` `=` `{2;0;4;-2;10;-8}`
vậy `m` `=` `{2;0;4;-2;10;-8}`
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