If the first two numbers in a tribonacci sequence are 5 and 11 and the eighth number is 260, what is the thir
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If the first two numbers in a tribonacci sequence are 5 and 11 and the eighth number is 260, what is the thir

[From: ] [author: ] [Date: 12-01-01] [Hit: ]
86+7x,therefore,......
Call the third number x.
Then, the sequence is:

5, 11, x, 16+x, 27+2x, 43+4x, 86+7x, 156+13x

therefore, the eighth number is:
156+13x = 260
x=8
Third number = 8
1
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