3^1=3——末尾數(shù)3
3^2=9——末尾數(shù)9
3^3=27——末尾數(shù)7
3^4=81——末尾數(shù)1
3^5=243——末尾數(shù)3
3^6=729——末尾數(shù)9
3^7=2187——末尾數(shù)7
3^8=6561——末尾數(shù)1
……
3^n的末尾數(shù)每4個(gè)一循環(huán)
2014÷4=503……2
3的2014次方的末尾數(shù)為9