$$ \int \frac{x+1}{x\left(1+x e^x\right)} d x= $$
$$ \log \left|c x e^x\left(1+x e^x\right)\right| $$
$$ \log \left|c x e^x\left(1+x e^x\right)\right| $$
$$ \log \left|\frac{c\left(1+x e^x\right)}{x e^x}\right| $$
$$ \log \left|\frac{c x e^x}{1+x e^x}\right| $$
Let $\vec{p}$ and $\vec{q}$ be the position vectors of P and Q with respect to the origin. If points R and S divide PQ internally and externally in the ratio 2:3 respectively, then $\overrightarrow{O R}$ and $\overrightarrow{O S}$ are perpendicular when
$4|\vec{p}|^2=9|\vec{q}|^2$
$9|\vec{p}|=4|\vec{q}|^2$
$9|\vec{p}|^2=4|\vec{q}|^2$
$4|\vec{p}|^2=9|\vec{q}|$
The length of the latus rectum of the curve represented by $x=3(\cos t+\sin t)$ and $y=4(\cos t-\sin t)$ is:
$\frac{32 \sqrt{2}}{3}$
$9 \sqrt{2}$
$\frac{9}{\sqrt{2}}$
$\frac{9}{2}$
If the function $f(x)=x^4-31 x^2+\boldsymbol{a} x+5$ has a turning point at $x=1$, then the value of ' $\boldsymbol{a}$ ' is $\_\_\_\_$ and the function attains a $\_\_\_\_$ at $x=1$
$a=50$, local minima
$a=58$, local maxima
$a=58$, local minima
$a=-50$, local maxima
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