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The key thing to remember with fractions, is that adding and subtracting them require a COMMON DENOMINATOR. We achieve this by multiplying both the top and bottom of fractions by a number that allows us to a...

The polymerase chain reaction (PCR) is a process to 'amplify' DNA to provide sufficient quantities for further analysis. PCR involves repeated cycles of heating and cooling of the reaction mixture. A single ...

This is a fairly typical example of a question from the Further Maths syllabus. We wish to demonstrate that for all integers n greater than or equal to 4, n! > n 2 . We briefly recap that n! is the produc...

The kidney is able to filter blood as it is made up of about a million filtering units. These units are called nephrons which are assosiated with capillaries. The blood flows to the glomerulus, which is a fi...

The essence of the question focusses on the short-term impact of the 1905 revolution with particular focus on the significance of such an event. Identifying the necessary and relevant factual knowledge is an...