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Selye’s General Adaptation Syndrome (GAS) states that prolonged chronic exposure to stress can be harmful to an individual and suggest that individuals go through three physiological stages: alarm, resist...

The first thing you must remember is to NOT PANIC whilst looking through past paper questions as it will seem there are a few hard words and structures that you may not have covered in your lessons...

An inequality is a difference in access to resources leading to social, economic, cultural advantages and disadvantages. Economic inequalities can cause and reinforce social inequalities.

The econo...

The first step to solving this is equation is to notice that the equation is of a similar to the form of a quadratic equation: ay^2 + by + c  = 0 where a, b and c are constants. Next we introduce a new va...

Let u = x²+4x+2 so y = ln(u).

Then dy/du = 1/u and du/dx = 2x+4.

Using the chain rule we have:

dy/dx = (dy/du)*(du/dx)

= (1/u)*(2x+4)

= (2x+4)/(x²+...