Past Papers’ Solutions | Edexcel | AS & A level | Mathematics | Core Mathematics 1 (C1-6663/01) | 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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