Transcription of OCR Core 4 Module RevisionSheet - Mathshelper
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OCR core 4 Module Revision SheetThe C4 exam is 1 hour 30 minutes long. You are allowed a graphics you go into the exam make sure you are fully aware of thecontents of the formula bookletyou receive. Also be sure not to panic; it is not uncommon to get stuck on a question (I vebeen there!). Just continue with what you can do and return atthe end to the question(s)you have found hard. If you have time check all your work, especially the first question youattempted.. always an area prone to Review binomial expansion from C2 for (x+y)nfor positive integern. Notice that it isvalid foranyxandyand that the expansion hasn+ 1 terms. The general binomial expansion is given by(1 +x)n= 1 +nx+n(n 1)2!
•If you have a repeated factor in the denominator then you deal with it as follows (notice the top line is a quadratic and the bottom a cubic, so partial fractions are fine):
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