**??? - 2016 JUNE Q2**

2. A sequence is defined as follows.

*u*

_{1}=

*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)

(ii)

[3]

(i)

*a*= 5(ii)

*a*= 6[3]