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f:R-{0} to R is defined as f(x)=x+1/x th...

`f:R-{0} to R` is defined as `f(x)=x+1/x` then show that `(f(x))^(2)=f(x^(2))+f(1)`

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f:R->R is defined as f(x)=2x+|x| then f(3x)-f(-x)-4x=

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f:R->R is defined as f(x)=2x+|x| then f(3x)-f(-x)-4x=