easy · GMAT Quant
A sensor signal function f(x) is defined for all real numbers x by f(x) = x · |x|.
Which of the following describes the relationship between f(-x) and f(x) for all real numbers x?
- f(-x) = -f(x), so f(x) is an odd function.
- f(-x) = f(x), so f(x) is an even function.
- f(-x) = |f(x)|, so f(x) is a positive function.
- f(-x) = 2f(x), so f(x) is a scaled function.
- f(-x) = f(|x|), so f(x) is an absolute function.
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