MCQ
If $y = x^{ln\, x}$, then $dy/dx$ equals :-
- A$ln\, x . x^{ln\, x-1}$
- ✓$x^{ln \,x-1} . 2ln\, x$
- C$x\, ln\, (ln\, x)$
- D$1/(x\, ln\, x) . x^{ln\, x-1}$
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where $[x]$ is the greatest integerr function of $x$,
$l_1:(3+ t ) \hat{ i }+(-1+2 t ) \hat{ j }+(4+2 t ) \hat{ k },-\infty< t <\infty $
$l_2:(3+2 t ) \hat{ i }+(3+2 t ) \hat{ j }+(2+ s ) \hat{ k },-\infty< s <\infty$
Then, the coordinate$(s)$ of the point$(s)$ on $l_2$ at a distance of $\sqrt{17}$ from the point of intersection of $l$ and $l_1$ is(are)
$(A)$ $\left(\frac{7}{3}, \frac{7}{3}, \frac{5}{3}\right)$ $(B)$ $(-1,,-1,0)$ $(C)$ $(1,1,1)$ $(D)$ $\left(\frac{7}{9}, \frac{7}{9}, \frac{8}{9}\right)$