
Chương
1 CÁC LỚP 678
1 TRẮC NGHIỆM
Câu 1 (TS10, 2020, Yên Bái). Sốdư trong phép chia A = 1+5+52 +53 +···+52020 cho 30 là A. 5. B. 0. C. 10. D. 1. Lời giải.
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