Definite integral evaluation (Jee Mains)

Definite Integrals and Reduction

Medium

$4\int_0^1 {\left( {\frac{1}{{\sqrt {3 + {x^2}} + \sqrt {1 + {x^2}} }}} \right)}$ dx – 3 log_e $\left( {\sqrt 3 } \right)$ is equal to :

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