MCQ
$\int_{ - 1}^1 {(\sqrt {1 + x + {x^2}} - \sqrt {1 - x + {x^2}} )\,dx}  =$
  • $0$
  • B
    $1$
  • C
    $ - 1$
  • D
    એકપણ નહીં.

Answer

Correct option: A.
$0$
a
(a) Let $f(x) = \sqrt {1 + x + {x^2}} - \sqrt {1 - x + {x^2}} $.

Then $f( - x) = \sqrt {1 - x + {x^2}} - \sqrt {1 + x + {x^2}} = - f(x)$

Hence $f(x)$ is an odd function and

so $\int_{ - 1}^1 {f(x)dx = 0} $.

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