definite-integral

Question: If $x({{x}^{4}}+1)\varphi (x)=1,$ then $\int_{1}^{2}{\varphi (x)\,dx=}$



1) $\frac{1}{4}\log \frac{32}{17}$
2) $\frac{1}{2}\log \frac{32}{17}$
3) $\frac{1}{4}\log \frac{16}{17}$
4) None of these
Solution: Explanation: No Explanation
Fundamental definite integration Definite integration by substitution

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