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Definite articles (le & la) have to be contracted every time they are in front of a word starting with a vowel or a silent h. For example, le + étudiant = l'étudiant, le + homme = l'homme. 

1. v=u+at Using a velocity time graph with constant acceleration, (graph provided as visual aid in tutorial) with initial velocity u and final velocity v, we can see that the graph is a straight line. ...

Intro- define trade and aid (this is the theory part). assess each side - trade effectivetrade effective as enables less wealthy countries to develop their economies. e.g. Vietnamese catfish; Ghanaian tom...

The key here is to simplify the left hand side. There are two different approaches to take here, one slightly faster but both perfectly legitimate. First approach: Remember the formula (a + b)^{2} = a^{2}...

A basic function of integration states that: for a function f(x), the integral of f'(x)/f(x) = ln[f(x)] (the natural log of the modulus of f(x)). Take the denominator of f(x), x⁴+1. We will ref...