(7^2020+7^2019):7^2019

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1. Đáp án:

    8

   Giải thích các bước giải:

    

   

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2. `(7^{2020}+7^{2019}):7^{2019}`

   `=\frac{7^{2019}+7^{2020}}{7^{2019}}`

   `=\frac{7^{2019}}{7^{2019}}+\frac{7^{2020}}{7^{2019}}`

   `=1+7^1`

   `=1+7`

   `=8`

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