Q
queenly_cute


cmr: a)[TEX] n^8 - n^4[/TEX] chia hết cho 240
b) [TEX]6^{2n} + 19^n - 2^{2n+1}[/TEX] chia hết 17
Chú ý latex
b) [TEX]6^{2n} + 19^n - 2^{2n+1}[/TEX] chia hết 17
Chú ý latex
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