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The function f Satisfies the function...

The function f Satisfies the functional equation ` 3 f (x) +2f ((x+59 )/(x-1))=10 x +30` for all real ` x ne 1`. The value of f (7) is

A

8

B

4

C

`-8`

D

`11`

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The correct Answer is:
B
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