MCQ
જો $y = (1 + {x^2}){\tan ^{ - 1}}x - x,$ તો ${{dy} \over {dx}} = $
  • A
    ${\tan ^{ - 1}}x$
  • $2x{\tan ^{ - 1}}x$
  • C
    $2x{\tan ^{ - 1}}x - 1$
  • D
    ${{2x} \over {{{\tan }^{ - 1}}x}}$

Answer

Correct option: B.
$2x{\tan ^{ - 1}}x$
b
(b) $y = (1 + {x^2}){\tan ^{ - 1}}x - x$

==> $\frac{{dy}}{{dx}} = (1 + {x^2}).\frac{1}{{(1 + {x^2})}} + {\tan ^{ - 1}}x(2x) - 1$

$= 2x{\tan ^{ - 1}}x.$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free