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Let a = 8 and b = `3^9` and we define a sequence `{u_n}` as follows
`u_1=b,u_(n+1) = {(1/3u_n ;,if u_n is mbox (multiple of 3)),(u_a +a ;,otherwise):}`
Then `u_500 – u_300 _ u_400` is equal to
A. |
1 |
B. |
3 |
C. |
5 |
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D. |
7 |