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)]=$3^{2020}$\ast 10–[$2^{2020}$\ast 5]=10($3^{2020}$–$2^{2019}$)10chiahếtcho10=>10($3^{2020}$–$2^{2019}$)chiahếtcho10=>$3^{2022}$+$3^{2020}S -$2^{2022}$ – $2^{2020}$ chia hết cho 10

   Trả lời