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It's important to structure your essays clearly and concisely to achieve the best grade. The 3-paragraph structure works well for A-level students. The essay should comprise an introduction, three paragra...

Whilst both the imparfait and the passé composé refer to actions in the past, they are used in different situations. On the one hand, the imparfait is used in descriptions, to talk about a habit or a long...

6a + 3b = 7 (1) 4a + 4b = 12 (2) We need to eliminate one of the variables in our simultaneous equations in order to be able to find a numerical value. As the same signs are used in both equations (i.e. a...

We will be using the quotient rule, although the product rule is also usable and can be run through if the student wishes. Firstly, define u = 8x, v = x-8 for simplicity. Then clearly u' = 8, v' = 1, and ...

For this we must use the chain rule. We start by defining x³ as a new variable, u = x³ Can then rewrite the expression as y = sin(u) Chain rule tells us that dy/dx = (dy/du)(du/dx) W...