Which of followings is f(-x) = -f(x)?

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Which of followings is f(-x) = -f(x)?

A、$$\frac{x^{3}}{x^{2}+1}$$
B、$$x^4+x^2$$
C、$$x^2(x+x^2)$$
D、$$x^3(x^2+x)$$
E、$$x^2(x^2-x)$$

答案：A

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