Techniques of Differentiation - Implicit Differentiation

Techniques of Differentiation - Implicit Differentiation

Find the \(\frac{\mathrm{d}y}{\mathrm{d}x}\) of the following functions in terms of \(x\) and \(y\):

  1. \(4xy - 3y^{4} = \cos y\)
  2. \(3\tan y + xy = y^{5}\)
  3. \(\cos (xy^{2}) + \ln (x + y) = 4\)

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Answer:(i) \(-\frac{4y}{4x+\sin y-12y^3}\) (ii) \(\frac{y}{5y^4-3\sec^2y-x}\) (iii) \(\frac{y^2(x+y)\sin(xy^2)-1}{1-2xy(x+y)\sin(xy^2)}\)

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