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数列{an}中,a1=3,a2=7,当n≥1时,an+2等于an•an+1的个位...
数列{an}中,a1=3,a2=7,当n≥1时,an+2等于an•an+1的个位数字,则a2010=( )
A.1
B.3
C.7
D.9
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