SOLUTION: what is the next number in the sequence {1,2,6,15,31,... }?
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Question 675295: what is the next number in the sequence {1,2,6,15,31,... }?
Answer by sachi(548) (Show Source): You can put this solution on YOUR website!
1, 2, 6, 15, 31, 56 92...
ist difference 1 4 9 16 25 36
2nd difference 3 5 7 9 11...........
2=1+1
6=2+4
15=6+9
31=15+16
56=31+25
so onans
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