Log in

View Full Version : Need some Math help :\



Runescapian321
09-18-2008, 11:19 PM
Quite a few of these kinds of threads these days eh? :p

Need some help with this problem -

What are all ordered triples of positive integers (x,y,z) whose product is 4 times their sum, if x < y < z?

I'm guessing that the equation would be something like 4(x+y+z) = xyz, but I have no idea how to solve that, and how to get all (not just one) of the ordered triples.

Thanks :)

EDIT: Oh, and I want to know how to solve it, not the answers.

xdefz0rx
09-18-2008, 11:42 PM
ummmm dude thats like maths for pros or just l33t hacks

Runescapian321
09-18-2008, 11:45 PM
Or for a 13 year old? :p

Well actually it's a bonus problem the teacher doesn't expect us to solve, but he said help is allowed. So I figured, where better than SRL? :)

n3ss3s
09-19-2008, 08:45 PM
http://answers.yahoo.com/question/index?qid=20071025193934AA4qdDV

Second result of google :p


That's math with some thinking involved (atleast for Jr. High), we are doing percents, most of our class survives of those, but then percent/10, "promille", everyone is being omfg about :(

R0b0t1
09-19-2008, 08:48 PM
... Perhaps the distributive property?

Runescapian321
09-19-2008, 08:50 PM
http://answers.yahoo.com/question/index?qid=20071025193934AA4qdDV

Second result of google :p


That's math with some thinking involved (atleast for Jr. High), we are doing percents, most of our class survives of those, but then percent/10, "promille", everyone is being omfg about :(

:duh: I saw that but at the time I didn't realize that there was an explanation there too. I hope I'll understand it :p

Thanks

EDIT: Meh, there's no way I'd be able to explain to my teacher how to do this problem, I'd know for 5 minutes after I do it, then forget :p Oh well...