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FP2 Series

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Part b, please help. I am aware of how to use the method of difference, just can't quite get the equation.
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Original post by IMZL
image.jpeg
Part b, please help. I am aware of how to use the method of difference, just can't quite get the equation.


Please post the question in the Maths Help Forum

http://www.thestudentroom.co.uk/forumdisplay.php?f=38

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