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??? - 2016 JUNE Q2

2. A sequence is defined as follows.

u₁ = a, where a > 0
To obtain u_{r+ 1}
• find the remainder when u_r is divided by 3,
• multiply the remainder by 5,
• the result is u_{r+ 1}.

Find

in each of the following cases.
(i) a = 5
(ii) a = 6
[3]

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