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The unseen commentary can be very daunting - some students think you can't revise for it (because it's unseen, right?), but I think you can, and the key to doing well is: (1) to consider the key elements ...

This thing we have to solve is an inequality and the solution we are looking for is an entire range of real number, something like "every x between 1 and 2", for example. To do this we need to b...

Firstly, ensure that you have all of the notes from class (or from tutoring sessions) from throughout the year. If you do not have all of the topics that are covered in the exam in your book, then you nee...

There are very few things any university will specific you HAVE to actually do, the more important things are showing that you have made an attempt at gaining relevant experience, and even more importantl...

NaOH + HCl --> NaCl + H2O

This is a typical acid-base reaction. The general formula for these reactions are Acid + Base --> Salt + Water. The metal in the base and the non-metal in the acid r...