Math Help

[AznDragon2004]

I'm just wondering if anyone could help me with my project. I've gone threw my notes and still having troubles doing part C 1 - 3.

So i hope someone will be able to help me. I'll have a reward if someone can help me.

here is the project link

http://www.learning.gov.ab.ca/k_12/testing/diploma/projects/feb_2004/puremath30_project.pdf

[Cyruss12]

I got to the copyright page and gave up, sorry.

[AznDragon2004]

np
anyone else know how to do thisstuff?

[sin]

whats the reward?

[eb0i]

They sure packed it with a lot of technical mumbo jumbo to confuse you! Just draw it out and think it through logically.

[V6-BoI]

Okay it's been a while since I did math 30 pure, but here's what I got when I did the questions, this might be wrong by the way.

Part C

1.
Ok the condtions are:
- either finger 1 or finger 2 as the barre (condition a)
- a finger that is higher in number than the two barre fingers to hold down the 5'th string (condition b)
So I'll list the ordered pairs as {condition a, condition b}
(eg. {1, 2}

so the number of possibilties are:
{1, 2}, {1, 3}, {1, 4}, {2, 3}, {2, 4}
so number of posibilities are 5

2.
The conditions for this question are:
- any fingers 1, 2, or 3 to hold down 4'th and 6'th strings in either order
- a finger that is higher in number (either 3 or 4) that the two fingers used to hold down the 4'th and 6'th strings to hold down the 5'th string
similarily I'll list the possibilities like in question 1, {4'th string, 6'th string, 5'th string}

so the number of possiblities are:
{1, 2, 3}, {1, 2, 4}, {1, 3, 4}, {2, 3, 4}
thus there are 4 possibilities

3.
Last 3 remaining choices are:
T, 1, 3, 4
T, 2, 3, 4
1, 2, 3, 4

The number of choices is 5C4, because you have 4 fingers and 1 thumb to pluck the strings (thus you have 5 in total) so out of that 5 you wanna pick 4 to pluck the 4 strings, thus, it's 5C4

Ok now if you can play the strings in any order, you gotta find the total number to order the strings. And they total number of ways to order the strings is 4!
You get this by the following:
To pick which string you wanna pluck first you got 4 possibilities. After you pluck one, you are down with 3 possibilities (cuz you can repluck the same string), after you pluck another, have 2 possibilities, and then 1, so it's 4*3*2*1 = 4!
And each of order of the strings, there are 5C4 ways to position your fingers, so thus the total is 4! * 5C4

I THINK these answers are right, and as for questions 1 and 2, I'm don't think there's a way to show it mathematically, and the question doesn't ask to show it mathematically anyways, heh.

[AznDragon2004]

Thanks V6-Boi

Haha i got the exactly same answers hehe!!!! :)


ANyone know how to do part b first question that deals with finding period and domain?

[V6-BoI]

Hmm, since it's a sinusoidal wave, the domain should be x is an element of the real numbers.
And as far as the period goes you should be able to find that out with your graphing calculator. Just find the x values at 2 points, and subtract them.