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By using direct address, like a personal pronoun or an imperative, the writer creates the illusion of a relationship with the reader. This synthetic personalisation makes the author more likeable, and the...

This integral is a particularly difficult integral that has shown up in STEP questions before. It's not hard because of how difficult the actual calculations are, but more because of how hard it is to spo...

To sketch a graph of an equation, there are several key features to consider. Firstly, we can consider where the graph crosses the x- and y-axes. When x=0, y=0, so the graph goes through the origin. If y=...

If the two graphs intersect, it means that they will share the same y and x coordinates at one particular point. (I will draw diagram to show point).

Therefore, you can set f(x)=g(x) so that x^2 -...

As with 'por' vs 'para, understanding how to use the verbs 'ser' and 'estar' can be tricky when learning Spanish, given both verbs translate as 'to be' in English. As a general rule, 'ser' is used to desc...