definite-integral

Question: The value of $\int_{-a}^{a}{\frac{1}{x+{{x}^{3}}}dx}$ is



1) 0
2) $\int_{0}^{a}{\frac{1}{1+{{x}^{6}}}\ }dx$
3) $2\int_{0}^{a}{\frac{1}{1+{{x}^{3}}}\ }dx$
4) $\int_{0}^{a}{\frac{1}{1+{{(a-x)}^{3}}}\ }dx$
Solution: Explanation: No Explanation
Properties of definite integration

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