Edexcel Core 4 MEI Exercises

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Does anyone have pdf files on MEI Exercises such as the one attached? I am not talking about Chapter Assessments which are easily available.
 

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  • Chapter 4 - Parametric differentiation.pdf
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  • Chapter 4 - Parametric differentiation ANSWERS.pdf
    128.2 KB · Views: 5
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How to solve part B,

Well, i know we can do it by completing square method BUT how can we prove that x > 0 for all values of xqs 1.png
 
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