Question 1 + Practice Paper 1 + CORE 1 A AS Maths
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All Comments (5)
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Cheers for these videos, you are a great teacher!
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Thanks for these videos.
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is the answer to part a not just 4 it can't be negative can because i thought the definition of the square root sign was take the positive root
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thankyou for your comment.
mathstutorbiz 1 week ago
Well this is debatable. If a square root sign is drawn then I would agree that only the positive root is implied (but not necessarily!) but as this question uses power notation one could argue that +/- is implied. In all honesty, most times the examiner is none to bothered!!
mathstutorbiz 3 years ago