MCQ
$\int \frac{1}{x+x \log x} d x=$ ___________ + C.
- A$1+\log x$
- B$\log |\log x|$
- ✓$\log |\log ex|$
- D$\frac{(1+\log x)^2}{2}$
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If $(2 \vec{a}+3 \vec{b}) \cdot \vec{c}=1670$, then $|\vec{c}|^2$ is equal to :