A) \[3f(x)\]
B) \[2f(x)\]
C) \[-f(x)\]
D) \[f(-x)\]
E) \[f(x)\]
Correct Answer: E
Solution :
We have, \[f(x)=3x+|x|\] \[f(2x)=6x+|2x|\] \[f(-x)\,=-3x+|-x|\,=-3x+|x|\] \[\therefore \]\[f(2x)-f(-x)-6x=6x+|2x|+3x-|x|-6x\] \[=3x+|x|=f(x)\]You need to login to perform this action.
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