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The key to getting into the top band of the mark scheme for 25 markers is to show sustained evaluation throughout the response.A very useful formula for answering these sorts of questions is to start with...

This is a standard 10 mark question in the unit 2 of OCR A-Level History.
The key is to not spend too long on the 10 marker as you can get near full marks by writing two solid paragraphs on each segm...

We want to simplify this equation to one that we know how to solve. If we let ((z+1)/z) = w, then we need to solve w^6 = 1, which is more familiar. Now we try to find the modulus and argument of w. w = re...

StructureFirstly, you need to ensure that your essay fully engages with and clearly answers the question that has been asked. Ensure that all of your answer links back to the quest...

Use the auxiliary equation k²-5k+6=0. Solving this gives roots k=2 and k=3, which are real and distinct roots. This means that the complementary function is of the form y=Ae^(k₁x)+Be...