Question

Tìm tất cả các số tự nhiên n để: 3²ⁿ + 3ⁿ + 1 chia hết cho 13

Answer 1

32n+3n=9n+3n⋮12" role="presentation" style="border:0px; direction:ltr; display:inline-table; float:none; font-size:14.04px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal" class="MathJax_CHTML mjx-chtml">32n+3n=9n+3n⋮12 đồng dư 12 mod 13

32n+3n=9n+3n⋮12" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:14.04px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal" class="MathJax_CHTML mjx-chtml">⇒32n+3n+1⋮13

 học tốt

Answer 2

32n+3n=9n+3n⋮12" role="presentation" style="border:0px; direction:ltr; display:inline-table; float:none; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal" class="MathJax_CHTML mjx-chtml">32n+3n=9n+3n⋮12 đồng dư 12 mod 13

⇒32n+3n+1⋮13" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal" class="MathJax_CHTML mjx-chtml">⇒32n+3n+1⋮13

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