indefinite-integration

Question: $\int_{{}}^{{}}{{{x}^{3}}\sqrt{3+5{{x}^{4}}}}\ dx=$



1) ${{(3+5{{x}^{4}})}^{3/2}}+c$
2) $\frac{1}{5}{{(3+5{{x}^{4}})}^{3/2}}+c$
3) $\frac{1}{30}{{(3+5{{x}^{4}})}^{3/2}}+c$
4) None of these
Solution: Explanation: No Explanation
Integration by substitution

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