OCR Core 1 Module RevisionSheet - Mathshelper

OCR core 1 Module Revision SheetThe C1 exam is 1 hour 30 minutes long. You 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 Changing the subject of an equation. For example iny= x+ 6,yis the subject of theequation. To change the subject toxwe merely need to re arrange tox=y2 6. Aharder example is make to makegthe subject ofT= 2 lg=T lg=(T2 )2 g=l(2 T)2=4 2lT2. To solve simultaneous equations, isolatexoryfrom one of the equations and substituteinto the other. For example, solvex+ 2y= 1,x2 2y2= the first we findx= 1 2yand putting into the second we find (1 2y)2 2y2= 31,which simplifies toy2 2y 15 = 0. This givesy= 3 ory= 5.

OCR Core 1 Module RevisionSheet The C1 exam is 1 hour 30 minutes long. You are notallowed anycalculator1. Before you go into the exam make sure you are fully aware of the contents of the formula ...

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