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Question from Arul:

Hi..
Please help me on this question..
Sequence 2, 7, 22,
after the first three terms, each term is three times the previous term plus 1, a(n+1)=3an + 1. What is the sum of tens digit 33rd and tens digit of the 35 term?

Thanks
Arul

Arul,

Write a few more terms in the sequence, say the first 10 terms, and examine the tens digits.

Penny

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