MCQ
$\int\limits_0^\infty {\frac{{x\log x}}{{{{\left( {1 + {x^2}} \right)}^2}}}\,\,dx = .........} $
- A$1$
- ✓$0$
- C$2$
- Dએક પણ નહીં.
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કારણ $(R) : \,{\left( {\vec x \,\, + \;\,\vec y } \right)^2}\, = \,\,|\vec x {|^2}\,\, + \,\,|\vec y {|^2}\,\, + \;\,2\,\,\left( {\vec x .\,\,\vec y } \right)$