Posted by Kim on Saturday, October 6, 2012 at 9:17pm.
1. each new number is 1/2 times the previous one ..
2. How about (-3)^n , were n = 0,1,2,3,...
3. What if I rewrote you fractions as
1/2 , 2/4, 3/8 , 4/16, 5/32 ...
Can you see what is happening ?
4. the odd-position numbers are all negative and contain as many 9's as the position in the sequence
e.g. the 7h number would be 9999999 (7 nines)
the even-position numbers are all positive and start and end with 1, with one less 0 between them as then position of the number
e.g. the 6th number is 1000001 (five 0's between the 1's)
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