We often have to differentiate functions. For functions of the form it is as simple as multiplying by the power and subtracting one from the power.

Example:

This extends to multiples and sums of powers of If we remember that and that when differentiating for these functions too we multiply by the power and subtract one from the power then,

The process is the same for all powers of fractions and negative powers included:

Whatever form the question is given it we must expression the function to be differentiated in the form For example,

We write this as then

These are some more examples,

Differentiation is used to find rates of change (when we differentiate with respect to time), gradients, slopes, tangents and normals.