easy · GMAT Quant
A function f(x) is defined for all real numbers x ≠ 0 by f(x) = x^3 + dfrac1x.
Which of the following equations holds for all non-zero values of x?
- f(-x) = -f(x)
- f(-x) = f(x)
- f(-x) = f(x) + dfrac2x
- f(-x) = -x^3 + dfrac1x
- f(-x) = 0
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