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Chinese characters appear to have little correlation at the start and because there are so many of them, they are hard to get your head round. Repetition is key to learning characters. it seems obvious, b...

Let the prisoners be named: A(black); WALL; B(white), C(black), D(white)

The middle prisoner in the row of three must know the colour of their hat.

D can see A and B but cannot work out the ...

• Think about which process we need to determine the turning point? - Differentiation 

• Think about the form of the given function. - Product of two functions, so use Product Rule...

‘The Flea’ is an erotic poem composed in the Elizabethan period, in the metaphysical style of writing. The sexual, unconventional content in contrast with the traditional iambic meter sets up the poem’s p...

When you are asked to integrate a function f(x), you are really being asked the question: "what function F(x) exists such that when you take its derivative, you are left with f(x)?"

Let u...