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    • Thread Starter

    Sorry for the triviality of this question, but in my C1 book, there is an example where they have 9^{\frac{1}{2}}=\sqrt{9}=\pm 3. This is strange since the conventional definition is that it is the positive root only. Does the Edexcel syllabus actually require both for a correct answer?

    IT's not just a typo either, since they do this as answers to several questions, yet there is an inconsistency since on the next page they have only positive values!

    alert me to the page number plz
    • Thread Starter

    (Original post by Joburger)
    alert me to the page number plz
    page 9
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