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It is not just trial and error, as this will eat away time in the exam. if you can't see it straight away then you need to consider some things. for example a common question might be find the integral of...

The first equation can be multiplied by 3 to give 3x + 3y = 9. Then these two equations can be added by summing both left hand sides and both right hand sides to obtain the new equation 3x + 3y - 3x + 5y ...

1. Begin with either a pronoun (Ich, Du, Er etc) or a noun (Der Hund) 

2. Use the relevant conjugation of 'werden'

3. <...

Crude oil has lots of molecules with different numbers of carbon atoms in them. A fractional distillation column is used to separate the molecules. It is hottest at the bottom and coolest at the top. Bitu...

There are multiple things you can do to prepare for an upcoming performance:

1. Practise 

This may seem like an obvious thing, but there is a lot to consider when it comes to rehea...