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1 3的次方位數為3,9,7,1,3,9,7,1 所以每四個一組. 2008=4*502 所以末尾數位是1
2的1次方個位是2 2的2次方=4,個位是4 2的3次方=8,個位是8 2的4次方=16,個位是6 2的5次方=32,個位是2 和2的1次方一樣 所以是4個一迴圈 2008÷4餘數是0 即相當於餘數是4 所以和2的4次方一樣 所以2的2008次方的個尾數是6
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