Differentiation

Basics of Differentiation

  • Understand Differentiation as the process of finding the derivative, or rate of change, of a function.
  • Familiarise with the term derivative and its notations - ‘f’(x) or df(x)/dx.
  • Be aware that the derivative of a constant is zero and the derivative of a linear term is its coefficient.

Key Rules

  • Memorise the Power Rule: The derivative of x^n is n*x^(n-1).
  • Comprehend Chain Rule for finding the derivative of a composite function, denoted as d/dx[ f(g(x)) ].
  • Grasp the Product Rule applicable to the derivative of a product of two or more functions.
  • Get a handle on the Quotient Rule for finding the derivatives of quotients of functions.

Context and Application

  • Appreciate that differentiation is used to solve real-life problems including optimisation and rates of change.
  • Know that differentiation from first principles is based on the idea of limits and is a proof for differentiating standard functions.
  • Understand how to find the equation of the tangent to a curve at a given point using differentiation.
  • Be able to use differentiation to determine turning points on the curve, identifying local maxima, minima, and points of inflection.

Advanced Differentiation

  • Understand how to differentiate exponential functions and log functions.
  • Recognise that the chain rule can be used to calculate the derivative of functions involving trigonometry and inverse functions.
  • Be capable of differentiating parametric equations using parametric differentiation.

Practice and Revision

  • Regularly tackle past papers, as the process makes a significant contribution to understanding and retention.
  • Expose yourself to a wide array of questions - straightforward, complex, abstract.
  • Occasionally study and solve problems in groups for a higher chance of understanding challenging concepts.
  • Remain persistent and patient when tackling complex differentiation problems.