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A function 'f' well defined AA x , y in ...

A function 'f' well defined `AA x , y in R` is such that `f(1)=2, f(2)=8` and `f(x+y)-kxy= f(x)+2y^(2)`, where 'k' is some constant then `f(x)` is

A

`x^(2)`

B

`3x^(2)`

C

`2x^(2)`

D

`4x^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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