chứng minh rằng 3^2022+3^2020-2^2022-2^2020 chia hết cho 10

1 bình luận về “chứng minh rằng 3^2022+3^2020-2^2022-2^2020 chia hết cho 10”

1. $3^{2022}$ + $3^{2020}S -$2^{2022}$ – $2^{2020}$ =$3^{2020}$ ($3^{2}$ + 1) – [$2^{2020}$ ($2^{2}$ + 1)] = $3^{2020}$ * 10 – [$2^{2020}$ * 5] = 10 ($3^{2020}$ – $2^{2019}$) 10 chia hết cho 10 => 10 ($3^{2020}$ – $2^{2019}$) chia hết cho 10 => $3^{2022}$ + $3^{2020}S -$2^{2022}$ – $2^{2020}$ chia hết cho 10

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