Posted by White Group Mathematics on January 12, 2018 at 12:20 AM | comments (0) |
Hello Mr Koh,
I recently encountered a problem in my holiday revision package which asked us to discover the equations of the tangents fo the curve x^2- axy +y^2 =a which are parallel to the y-axis. I managed to compute an expression via implicit differentiation for the gradient function, ie dy/dx = (ay-2x)/ (2y-ax) which I am not sure if it is correct; I also d...
Read Full Post »Posted by White Group Mathematics on November 28, 2016 at 4:40 AM | comments (0) |
Hi Mr Koh it's XXX. I have a question for you:
Why did the teacher use cross product instead of dot product? Thank you.
The way the respective dot and cross product results arise are attributed...
Read Full Post »Posted by White Group Mathematics on September 28, 2016 at 4:50 AM | comments (0) |
Hi Mr Koh,
I chanced upon your website online and I'd really like to engage you as my private tutor. I'm currently a JC2 student studying in SAJC. I know this is very last minute, but I really do need the help; in summary, I've tried really hard to work on my Math, however I really don't see any improvements in my grades and I...
Read Full Post »Posted by White Group Mathematics on August 26, 2016 at 2:25 AM | comments (0) |
Hi Mr Koh,
I can't seem to get around this problem, could you please help?
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Posted by White Group Mathematics on February 13, 2016 at 9:05 PM | comments (0) |
I am having considerable difficulty grappling with this OCR problem. Could you kindly assist?
Student X
Worked it ...
Read Full Post »Posted by White Group Mathematics on February 2, 2016 at 6:00 AM | comments (0) |
I was given some basic calculus revision questions to do for an undergrad module, but since there's nothing new in them, so I decided to give these questions an A-level tag. I've been working on them for a while now, but I'm stuck at this. Any help would be appreciated; I'm not particularly bothered if you want to post the answers as it's not an assessed homework, and I'm starting to get tired of these.
Student X
...
Posted by White Group Mathematics on January 24, 2016 at 11:50 AM | comments (0) |
Sales of cooking oil bought in a shop during a week follow a Poisson distribution with mean 100. How many units should be kept in stock to be at least 99% certain that supply will be able to meet demand? Use normal approximation to Poisson distribution, if appropriate.
I have already approximated the distribution to Y ~ N (100, 100). Then, I have tried to use P(Y>y) = 0.99 . That didn't work so I...
Read Full Post »Posted by White Group Mathematics on November 4, 2015 at 10:10 AM | comments (0) |
Hi Mr Koh,
I am unsure how about how the solution for part (a) is formulated. Could you please help?
...
Read Full Post »Posted by White Group Mathematics on August 4, 2015 at 9:40 PM | comments (0) |
Hi Mr Koh,
How do I do this question- In an Argand diagram, the points A, B, C and D represent the complex numbers a, -2+5i, c and 3/2 - 1/2 i respectively. Given that ABCD is a rectangle described in the clockwise sense with BC=2AB, find a and c.
Posted by White Group Mathematics on July 19, 2015 at 10:40 PM | comments (0) |
Hi,
Here in my country, when you buy lottery tickets, you try to guess the six (6) combination of numbers out of 42 numbers. Unlike in Sweepstakes, the order of numbers does not really matter.