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In part (a) the majority obtained 403 and some wrote their answer as £4.03, there was the usual crop of arithmetic errors with 2 ×199 = 298 or 498 being quite common. In part (b) the sum formula was us...

There are a range of methods commonly used for differentation, but my favoured method is as follows:E.g. Differentiate 3x^21) Separate into three separate parts - the Coefficient (the number at the front,...

Although differentiation is often taught in an abstract way, it's applications are virtually limitless. It's primary purpose is to determine the gradient of a line at a given point on a curve. Unlike with...

There is a simple trick to drawing the inverse of a given function. 

First, roughly sketch the original function. This means a sketch of the general shape of the curve with some key chara...

First, we must find the value of y when x = 2.

y = x³+4x+5 = (2)³+4(2)+5 = 21

Then we must find the gradient of the tangent line. This can be done by d...