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This is a common question among A-Level Maths students, as integration by parts requires 2 things: 1. Something to integrate ; 2. Something to differentiate. In ln(x), we can immediately see that ln(x) is...

This kind of question is extremely common in A level biology, they want you to explain a system and apply your knowledge of biological principals to it.

To understand alveoli we need to understand ...

The first important thing to remember is that there is no equivalent in Enlgish, as both verbs mean 'to be'. They can also not be used interchangeably, and both have a slightly different meaning. I think ...