Past Papers’ Solutions  Edexcel  AS & A level  Mathematics  Core Mathematics 1 (C16663/01)  Year 2015  June  Q#7
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Question
Given that ,
a. Express in terms of y.
b. Hence, or otherwise, solve
Solution
a)
We have;
We are given;
Therefore;
b)
We are given;
As demonstrated in (a) and given , therefore;
Now we have two options.







Substituting these values in following given equation yields corresponding values of x.
For ; 
For ; 









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