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CIE- A Level June 2013 Mathematics P1 9707/12

Hello sir! I'm afraid you made a mistake in the part (iii) of this question. If d^2s/dr^2 has a positive value, the curve/nature should be minimum. You wrote maximum there. Thank you for the solutions though, they're really useful and informative!
- XMashup
- Post #39
- Oct 27, 2013
- Forum: A-Levels

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