Question

[Đặng Phương Anh]

cmr: Với mọi số nguyên dương thì:

5^n.(5^n+1) - 6^n .(3^n +2^n) chia hết cho 91

Answer 1

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kho....................wa..................troi.......................thi.....................ret.................lanh................wa..................tich............................ung.........................ho..............minh......................cho....................do....................lanh