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The aim of the introduction is to indicate the direction your essay will take and demonstrate to the examiner that you are going to meet the criteria of the mark scheme. An immediate overview of the First Wo...

Differentiation is a mathematical operation which we can use to study how one quantity, such as the distance travelled by a train, is affected by another quantity, such as time. For example, if the train is ...

Factorising basically means put whatever equation you are given into brackets. So, E.g. x 2 + xFirst you want to look for a common factor which here is X. Therefore, the answer would be x(x+1).To check this ...

Current is a measure of the rate of change of charged electrons going through the wire. Therefore, when the current increases more electrons are passing through the wire in a unit time. Thus, their average v...

8,5,6Add '-x-' to each of the three terms on the leading diagonalCalculate the determinant of the 3x3 matrix and set equal to zero (property of eigenvalues)Factorise to find values of x, for which the determ...