tìm x biết `9^x = 81`

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tìm x biết `9^x = 81`

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  1. Nhii
    0
    2024-02-04T14:38:26+00:00

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    `9^x = 81`

    `=>9^x = 9^2`

    `=>x = 2`

    Vậy: `x = 2`

     

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