Math Community Quiz

[Ashbad]

f(X)=((X+1)+X/4)*(X<15)+(X+(X-1)/3+19)*(X>14)*(X<30)+((X+52)+X/2)*(X>29))

so is this a no-go or what?

that is correct!

nice nemo

[Xeda112358]

Ah, but the equation can be made without piece-wise functions, too.

[ruler501]

the determinant of N is -95396800. Or a possibly infinite other numbers. all negative I believe.

[nemo]

the determinant of N is -95396800. Or a possibly infinite other numbers. all negative I believe.

yeah, you win.

[ruler501]

How many questions are left open right now I'll ask the next one tomorrow morning my time.
Lets try not to have 3 open questions again 

EDIT: The Problem Show proof of answer
Assuming the 15 kilogram object is constantly being pushed at 100,000 Newtons how long will it take to go a light-year?
e=m*c^2
f=m*a
e=(m*c^2)/√(1-v^2/c^2 )-m*c^2
E= energy in Newtons
M= mass in kilograms
A=Acceleration in Meters per second per second
C= the speed of light in meters per second
V = velocity in meters per second

EDIT2: How are you guys doing?

[Xeda112358]

Wow, yeah. This is definitely not my kind of thing. Also, I just want to point out that it has recently been discovered that certain "laws" of physics don't actually work in the far reaches of the universe (meaning some equations will need to be altered). I think one of them involves gravity.

[ruler501]

Should I post a new problem or will anyone try to solve this?
@Zeda That is very interesting.

[Xeda112358]

It's not something that I can do, so I am not going to attempt it.
And yeah, I read it in some sciency magazine I got in the mail. I thought it was pretty cool.

[ruler501]

Open Floor anyone can ask a question

(Just please don't be another one on determinants)

[jnesselr]

So you have the determinant of this matrix... j/k

Okay, so given a function f(x) = N mod X, which is a recursive function. eg, the result becomes the new X.  However, it goes over a little transformation first.  N mod floor(f(x)*N/(N mod f(x))-> X  Given this pattern for X, find N:
541, 4551, 51587, 3...

[ruler501]

Simple program I'll right it later when I have time

EDIT is this the first values of the series and is it the beginning
541, 4551, 51587,

[jnesselr]

Simple program I'll right it later when I have time

EDIT is this the first values of the series and is it the beginning
541, 4551, 51587,

I started at 451.  And it's been much longer than 6 hours, and I barely noticed your edit.  I don't know if it is the beginning, you would have to try going backwards, and I don't want to do that, nor do I know how to do that well, with the floor() and all.

[jnesselr]

So I'm assuming no one has gotten it.  To tell the truth, I don't even remember the answer.  it was like 77,000 something.

[ruler501]

I got confused and have been having way to much to do so I couldn't work on it. You want to ask another one?

[nemo]

here's something that's been troubling me for a program i'm writing:

given two variables x and y, find an equation that will produce z. a table is given below.

Code: [Select]

  2|3|4    x
1|4 6 8
2|3 3 2
3|2 1 .
4|1 . .

y

so in your equation, when you put 3 in for x and 2 in for y, you get 3. when 2 is put in for x and 4 in for y, you get 1. etc.
do not worry about the periods in the table.

i don't know the answer, so good luck.