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y is a function of x₁ and x₂. We are asked to derive y with respect to x₁, meaning that x₂ remains constant. 

Note that y' is the deriva...

George shows loyalty to Lennie at many points throughout the novel. For example, in Chapter 1, he tells him to come back to the river if he ever gets into trouble. This shows how much he cares about Lenni...

They key thing to remember is P.E.E (Point, Evidence, Explanation). In your introduction you should start of introducing what you are going to discuss. Then each paragraph should be a different point, for...

English: Present continuous to talk about the future - I am going to go... 

French: Present to talk about the future - Je vais aller... 

In diamond, each carbon atom forms 4 strong covalent sigma bonds with other carbons, resulting in a tetrahedral 3D arrangement of atoms where all the electrons are fixed in place or localised. In graphite...