1.

If \[x=\exp \left\{ {{\tan }^{-1}}\left( \frac{y-{{x}^{2}}}{{{x}^{2}}} \right) \right\}\,\,\], then \[\frac{dy}{dx}\]equals [MP PET 2002]

A.            \[2x\,[1+\tan \,(\log x)]+x{{\sec }^{2}}(\log x)\]
B.            \[x\,[1+\tan \,(\log x)]+{{\sec }^{2}}(\log x)\]
C.            \[2x\,[1+\tan \,(\log x)]+{{x}^{2}}\,\,{{\sec }^{2}}(\log x)\]
D.            \[2x\,[1+\tan \,(\log x)]+{{\sec }^{2}}(\log x)\]
Answer» B.            \[x\,[1+\tan \,(\log x)]+{{\sec }^{2}}(\log x)\]


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