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November 23, 2014

Posts by Francesca


Total # Posts: 149

Discrete Math
I think I found something about the overbar _ a <--- equivalence class of a _ b <---equivalence class of b
March 14, 2011

Discrete Math
Could you tell me if I am correct in thinking: • With respect to congruence mod 29, 17 ∩ 423 = ∅ (True) • Let a, b, and n be integers with n > 1. Then a ≡ b (mod n) ⇔ a = b (False) •If ac ≡ bc(mod n), and gcd(c, n) = 1, then a &#...
March 14, 2011

Discrete Math
Hmmm...I kind of get what you are saying, but why is 18 not a set that does not include 2? Here is an example in the book that is true: _ 55 ∈ 7 (mod 3) _ 7 (the line goes over 7 in the above) Why would this be considered true?
March 14, 2011

Discrete Math
2 ∈ 18 (mod 8) It is true though, right?
March 14, 2011

Discrete Math
So, this would read as : _ __ 2 = 18 (mod 8) Meaning this would be considered true, right?Because 18/8 = 2, and then 8 · 2 = 16, making the remainder 2. This might sound silly, but what does the symbol at the top of the number mean? _ 2
March 14, 2011

Discrete Math
Congruence True or False: (give reason) _ __ 2 ∈ 18 (mod 8) Can someone please help with this problem? I'm confused. . . Thanks for any helpful replies.
March 14, 2011

Math
Let f(x^2/3). Find f(S) if S = {1,5,7,11}.
February 24, 2011

Discrete Math
Hi, I need help with interpreting a figure. You can find it one photobucket. First, type in flutegirl516 in the search bar and then click on the message that says: "Are you looking for the Photobucket user flutegirl516? Click here to see this user's profile" I ...
February 22, 2011

Discrete Math
Okay thank you for the clarification :)
February 19, 2011

Discrete Math
So, how would F ° h ° G be defined? It seems the domain is A and the range is C, right? But why does it exist? Does it exist because it can be proven using sample problems or it it because of the figure and the direction of the arrows? IDK. That's what I am having ...
February 19, 2011

Discrete Math
Thank you for replying. So if this question makes any sense: How do you know I must start with G first? It makes sense because it actually works when I create samples, but it seems that I am working backwards, why is that? But I think I am kind of following. . .
February 19, 2011

Discrete Math
So, I uploaded the figure in photobucket, and if you type flutegirl516 in the search bar you will see it's the first photo. F:B→C, h:C→B, and G:A→C Is F°h°G defined? If so, what is its domain and range? Yes it is defined. And I thought that the ...
February 19, 2011

Discrete Math
Okay thank you
February 17, 2011

Discrete Math
I received that picture from my teacher. . .that's what she says is correct. That's why I am so confused. . .I didn't just make that up. . .So I really don't know what to follow, but I guess if I want to get a good grade I better just go along with the teacher...
February 17, 2011

Discrete Math
So, if A = (1, 2, 3) and B = (4, 5, 6) f: A -> B => {(1, 4), (2, 5), (3, 6)} g: B ->A => {(4,1), (5,2), (3,6)} g ° f = {(4,4), (5,5), (6,6), so g ° f = B right? And the domain and range are equal. But I'm still sure how it is defined? When finding the ...
February 17, 2011

Discrete Math
So, if A = (2,4,6) and B = (21,42,52) g : B -> A, wouldn't g = {(21,2), (42,4),(52,6)}? Is g ° f defined because it is one-to-one?
February 17, 2011

Discrete Math
Can you give an example using numbers?
February 17, 2011

Discrete Math
f: A→B, g :B→A Is g ° f defined? If so, what is its domain and range? Any suggestions?
February 17, 2011

Physics
Figured this one out already had to use the equation: x = v₀x√(2h/g)
February 16, 2011

Physics
An archer shoots an arrow horizontally at a target 14 m away. The arrow is aimed directly at the center of the target, but it hits 59 cm lower. What was the initial speed of the arrow? So, I am trying to find find v₀x. . .
February 16, 2011

Discrete Math
Also thank you for the time you took out to help me :)
February 15, 2011

Discrete Math
Oh okay we posted at the same time. . .You were such a big help! I really understand this stuff a lot better. Thank you a thousands times!
February 15, 2011

Discrete Math
How about this? Let f: A→B be a function from A to B. f = {(w, 1), (x, 2), (y, 3), (z, 2)}. Find f^-1. Answer: f^-1 = {(1, w), (2, x), (3, y), (2, z)} So would this one not have an inverse?
February 15, 2011

Discrete Math
Hey, I know I said the previous would be the last one but can you check this one too. . . Let f: A→B be a function from A to B. f = {(w, 1), (x, 2), (y, 3), (z, 2)}. Find f^-1. Answer: f^-1 = {(1, w), (2, x), (3, y), (2, z)}
February 15, 2011

Discrete Math
Oh it looks strange b/c they all end in zero. Just noticed. . . Is this correct? f ° g ° h = {(1,1), (2,2), (3,1), (4,2)
February 15, 2011

Discrete Math
They appear a little strange. . .how so? The h² does not effect the answer at all? OK so last one f ° g ° h. . .I will attempt now, and check back and see if I am on the right track. . .
February 15, 2011

Discrete Math
Lol. . .But really Thank You! You are really helping me to understand. I know you are probably annoyed by my silly questions, but I am really starting to get a better understanding. Ok so would h ° h = {(1,1), (2,1), (3,1), (4,1)}? But the h² is throwing me off.
February 15, 2011

Discrete Math
Is this correct? g ° h ={(1,2), (3,1), (1,2), (4,3)}
February 15, 2011

Discrete Math
There is something not connecting in my thought process. I'm still confused with g ° h does it = {(1,2), (3,1), (1,2), (4,3)}? I feel way off. . .I am doing something terribly wrong. IDK
February 15, 2011

Discrete Math
So is this correct? g ° f = {(1, 4), (2, 2), (3, 2), (4,3)}
February 15, 2011

Discrete Math
Here are the functions from the figures: • f(x) = {(1, 2), (2,1), (3,1), (4, 4)} • g(x) = {(1, 2), (2,4), (3, 1), (4, 3)} • h(x) = {(1, 1), (2, 3), (3, 1), (4, 3)}
February 15, 2011

Discrete Math
"There are two 1s in the range of f(x) though (1,2) **I meant to say (2,1)** and (3,1). . .Does that mean anything?" Anyway, scratch this statement of the previous post. . .
February 15, 2011

Discrete Math
Ok so g ° f = {(1, 4), (2, 2), (3, 2), (4,3)} There are two 1s in the range of f(x) though (1,2) and (3,1). . .Does that mean anything? Is this correct: Does g ° h = {(1, 2), (2?, 2?), (3, 2), (4, 1)}? For this one there was no 2 in the range of h. Also, for h^2 = h &...
February 15, 2011

Discrete Math
ooOo I think I get it now. . .
February 15, 2011

Discrete Math
I'm using the search bar at the very top right-hand corner, then I enter: flutegirl516. It will say no matches found, but it will say: Are you looking for the Photobucket user flutegirl516? You can also try using the search bar drop down menu and clicking on "Users,&...
February 15, 2011

Discrete Math
I read the the link you provided previous to posting this discussion, but I was still confused.
February 15, 2011

Discrete Math
Well, I am suppose to find the composition of functions from a figure. If you don't mind I uploaded a photo of it on photobucket. Can you take a look, and offer any suggestions for the first problem, so that I can get an idea? Since this forum will not let me post a link I...
February 15, 2011

Discrete Math
Find g ° f f(x) = {(1, 2), (2,1), (3,1), (4, 4)} g(x) = {(1, 2), (2,4), (3, 1), (4, 3)}
February 15, 2011

Discrete Math
ok thank you!
February 15, 2011

Discrete Math
Determine the domain and range of: y = 5 – [1/ (1 + x)] So, would the domain be all real numbers except -1? And would the range be all real numbers except zero? I'm really confused. . .
February 15, 2011

Discrete Math
OK Thank you!
February 15, 2011

Discrete Math
Find the inverse of f: R→R given by f(x) = x³ – 2
February 15, 2011

social studies
what are the best desciiptions of both push and pull facors?
January 19, 2010

Geometery
I need to know the laws of triangle inequality. i need help what is triangle in equality?
January 6, 2010

Social Studies
I heard of them but i'm not exactly sure about them.
January 10, 2009

Social Studies
I think it is 1. But i'm not sure if choice 2 refers to the Byzantine Empire, which in that case, I think it would be 2.
January 10, 2009

Social Studies
The effectiveness of Roman rule can easily be seen in the fact that the fall of Rome led to 1) political chaos and economic collapse in western Europe 2) the rapid rise of a new European empire
January 10, 2009

World History
By the way, my friend Jonathon, thinks it's 2. What do you think?
January 10, 2009

World History
Yes this is a multiple question. I think the answer is choice 1 but im not sure. - Francesca
January 10, 2009

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