On this page, you can find the recording of the Recorded Exam Training for QM1 (Maths) [Quantitative Methods 1]. Feel free to ask questions in the comment section below, we will answer them 🙂 You will get free access to last year’s recording until the new version for this year is released.
The Exam Training Recording will be released by 16/10/2022 by 20:00 o’clock!
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Hi,
I have a question concerning exercise 12. I understand that, if the first derivative is constantly decreasing, there will be one extreme value at most. What I don’t understand is that there is the possibility to have no extreme value at all. Because if the first derivative is constantly decreasing, it must cross the x-axis exactly once and therefore I do not understand how f(x) can have no extreme values at all.
Thank you for your help. I’m looking forward to your response.
Best,
Louis
Hi Louis,
It might never cross it if it only has negative or only positive values. So it could top before the x-asis or it could begin under it. I hope this answers your question!
Misia
Hi,
I have a question about exercise 25.
I don’t know how you got to the answer 4 for f”xy.
Thanks in advance
Zélie
Hi Zelie,
The first derivative with respect to y is 6y^2 + 4x. Now we have to take a derivative of that but with respect to x, so we treat y as a constant. 6y^2 is just a constant so it falls away, and the derivative of 4x is 4.
Misia 🙂
For Question 15.E Economic Application
when we calculate our new sales, after finding the new d, why do we multiply by the old price ( p=10) and not p=15?