/sci/ - Science & Math

File: 2 KB, 143x108, problem.jpg [View same] [iqdb] [saucenao] [google]

Anonymous Mon Sep 27 20:44:33 2010 No.1813260 [Reply] [Original]

having some trouble with my homework if im supposed to find the domain of the function how would i do it

>>	Anonymous Mon Sep 27 20:44:33 2010 No.1813261 your penis must be put inside

>>	Anonymous Mon Sep 27 20:45:33 2010 No.1813265 You can't solve that problem. You have two variables. Silly OP.

>>	Anonymous Mon Sep 27 20:45:33 2010 No.1813270 what values can you stick in for x without getting an undefined answer in the case of your picture, you can put any number in for x, except for positive four. Therefore, the domain is (-infinity,4) and (4,infinity)

>>	Anonymous Mon Sep 27 20:45:33 2010 No.1813271 >>1813261 is right >>1813260 don't undervalue the importance of putting it inside and keeping it in there regardless of what is said

Anonymous Mon Sep 27 20:47:33 2010 No.1813281

Well first off, this is a homework thread so I'm going to report you for breaking the rules. Hard life but that is how it goes.

Secondly, the domain is x= all numbers, except 4. This is because when x = 4, y = 1 / 0 (Which is not defined).

http://www.wolframalpha.com/input/?i=Plot[%28-4+%2B+x%29^%28-1%29%2C+{x%2C+3%2C+5}]

Rebirth !NuJBxbKoek Mon Sep 27 20:51:33 2010 No.1813293

>>1813260

For what value does does the function not exist / there is a dilemma?

The answer is very, very simple and anyone can tell it to you without giving it a second thought, but I want you to think about this. I don't want you to just grab an answer from someone. Domain and range aren't mathematical equations you can manipulate. Both aspects are strictly conceptual.

If you imagine the graph of 1/x-4, for what value of x does the graph 'stop' or 'cease to exist?' By that, I mean, what value makes the graph undefined? From a relatively simplistic standpoint, we can assume that every possible value of x -- save for one -- fits into the function and the graph is undaunted.

What is that ONE number, though? That one number that makes it undefined? Once you find that number, you can stipulate one or two things:

1) The function is completely undefined; there is no domain.

OR ..

2) The function is defined at all points except that particular point.

Someone already answered the question, btw; I just want to provide the conceptual basis for it.

>>	Anonymous Mon Sep 27 20:53:33 2010 No.1813302 >>1813293 How homework threads should be replied to. If you don't spoon feed them it'll weed out the ones who just want a answer and don't care about how you get it.

>>	Anonymous Mon Sep 27 20:57:33 2010 No.1813325 >>1813260 as it turns out the answer was in the back of th book the whole time but now i full understand thank you

>>	Anonymous Mon Sep 27 21:05:23 2010 No.1813364 >>1813325 You're probably going to fail your class.

Advanced search
Text to find
Subject [?]Search by post subject. Leave empty for any.
Username [?]Search for user name. Leave empty for any user name.
Tripcode [?]Search for tripcode. Leave empty for any.
Email [?]Search by email. Leave empty for any.
Filename [?]Search by image filename. Leave empty for any.
From Date [?]Enter what date to start searching from. Format is YYYY-MM-DD
To Date [?]Enter what date to start searching until. Format is YYYY-MM-DD
Image hash
Search in	All Posts OPs Only
Deleted posts	Show all posts Show only deleted posts Only show non-deleted posts
Internal posts	Show all posts Show only internal posts Show only archived posts
Order	New posts first Old posts first
Capcode	All Posts Only by Users Only by Mods Only by Admins Only by Developers
Results	Posts Threads
Action	[ Simple ]