gmat数学题.if n is a positive integer,what is the remainder whe

gmat数学题.if n is a positive integer,what is the remainder when (3^8n+3)+2 即3的8n+3次方加2is divided by

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lazyegg 幼苗

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emainder is 4.因为3^n个位数是3,9,7,1的不断循环.因为n是正整数,所以8n＋3除以4的余数是3,因此3的8n+3次方的个位数永远是7.由此,(3^8n+3)+2 的个位数是9.除以5,则余数为4.

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