The sequence of numbers S=s1,s2,s3… is defined by s1=2,s2=10, and for each positive integer n greater than or equal to 3. For example, s3=102. What is the greatest value of n for which sn has 2,000 or fewer digits?
A.100
B.20
C.5
D.4
E.3
我的答案:
The sequence of numbers fff\(S={s_1,s_2,s_3…}\)/fff is defined by fff\(s_1=2,s_2=10\)/fff, and for each positive integer n greater than or equal to 3. For example, fff\(s_3=102\)/fff. What is the greatest value of n for which sn has 2,000 or fewer digits?