Search results

Thanks tywebb. I didn't realize Lumi wrote solutions to the "coroneos 100". Even though I have written my own solutions it would be interesting to compare techniques.

Wow! I didn't know this existed. Even though I enjoy scratching my head on a few of Jim's questions, it would be nice to get hold of a copy as a backup. You don't know where one could obtain a copy tywebb? So back to the original query. What does the "*" mean in some of his questions?

Hi, I have been writing solutions to the book Extension 2- Unit 4 by Coroneos. What a great book! However, I have come across a '*' notation many times. What exactly does Jim Coroneos mean by this? See diagram below. He tends to use it for distances as well as sizes. Is there a 'definite'...

Here are a few from a very old Applied Mathematics text book. Enjoy.

Can you please tell me where these questions came from.

Ask yourself the question. How many choices (from 6 letters) are there to select the letter A? Your answer should be \frac{2}{6}. Ask yourself the question. How many choices (from 5 letters remaining) are there to select the letter S? Your answer should be \frac{2}{6}\times \frac{1}{5} ...

I wrote the solution to a permutation question from an old Applied Mathematics book used in Victoria in the 1970s. The first chapter was on permutations and combinations. Actually, really good practice in this area. Anyway, the solution to question 13 is attached as a PDF file written in...

Here is the way that might make it easier to understand. You have 4 rooms, OK, so draw 4 small squares. Ask yourself the question. 'How many choices (or people) can i select to occupy the first room? '. The answer is 4, so place a 4 in the first square. Moving to the next room (or square)...

Are we advertising now?

Thanks tywebb, Muchas Gracias!

Any links as to where one can download the paper. The BOS haven't posted it yet.

Here is the solution written in Latex.

Thanks tywebb, that's exactly what I got. I appears the answer at the end of the text is incorrect. Frustrating to say the least.

I came across this problem from the Cambridge Ex 2 book, the Mechanics section. Part (d) has me scratching my head. Obviously \alpha cannot be 1. This results in an improper integral. From part (c) \begin{align*} \dot{y}^2 &= \frac{3g(3 - 2y)}{3 + 2y} \,\,\, \text{which simplifies to }...

Any change of putting a link so I can see the paper?

Thanks.... I like the question!

Hi, As a matter of curiosity, where did this question come from?

Substitute x = 1 into the binomial equation call call it 1. Substitute x = - 1 into another binomial equation call call it 2. Add the 2 equations. Noting when you add an even number + odd number = odd number. The 'odd' binomial terms cancel and the 'even' terms are doubled. Hope that is a...

Hi, Are you after a solution to this problem as well?

This may help. Divide each term by z^2, then collect 'like' terms i.e 5(z^2 + z^{-2}) - 11(z + z^{-1} ) + 16 = 0. Then use part (a).