If the tangent to the curve y = f(x) is perpendicular to y – axis then 

If the tangent to the curve y = f(x) is perpendicular to y - axis then 

  1. A

    dydx=0

  2. B

    dxdy=0

  3. C

    dydx=1

  4. D

    dxdy=1

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    Solution:

    dydx=f1(x)=0

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