indefinite-integration

Question: $\int_{{}}^{{}}{\frac{dx}{x({{x}^{7}}+1)}}=$

1) $\log \left( \frac{{{x}^{7}}}{{{x}^{7}}+1} \right)+c$

2) $\frac{1}{7}\log \left( \frac{{{x}^{7}}}{{{x}^{7}}+1} \right)+c$

3) $\log \left( \frac{{{x}^{7}}+1}{{{x}^{7}}} \right)+c$

4) $\frac{1}{7}\log \left( \frac{{{x}^{7}}+1}{{{x}^{7}}} \right)+c$

Solution:

Explanation: No Explanation

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