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Following questions are based on the giv...

Following questions are based on the given information for the following functions f (x)
`f(x) =2bx +f(-x)," if " x lt 0`
`f(x)=a, " if "x =0`
`f(x)=b+c-2cx +f(x-1)," if "x gt 0`
If a = 15, b = 11, c = – 3, then f (7) equals:

A

239

B

115

C

`-147`

D

none of these

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The correct Answer is:
A
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