TheCatSite.com › Forums › General Forums › The Cat Lounge › A little help
New Posts  All Forums:Forum Nav:

A little help

post #1 of 18
Thread Starter 
Gift donations will be made to anyone who can help me with any of these:

A) For each part, find a function f: R -> R that has the desired properties: neither onto nor one-to-one

B)Under what conditions does A\\(A\\B) = B?

C)Define f:J -> N(natural numbers) where f(n) = 2n-1 for each n element of N(natural numbers).

D) Given A = {1,2,3,4,5}, B = {2,3,4,5,6,7} and C = {a,b,c,d,e} state an example of f: A ->B, g: B-> C, such that g(f(x))(the composition of g onto f) is 1-1 but g is not 1-1.

These are problems for homework that is due on Friday.
post #2 of 18
Do you see the irony here in your username and this question?
post #3 of 18
Thread Starter 
This isn't algebra, its graph theory, but yes I do see a little irony here. IF you need definitions of onto and 1-1(one-to-one) I will be happy to provide them.
post #4 of 18
Oh i'm so far out of my league here it's scary . I just thought it was funny.
post #5 of 18
Lol i have not got a clue , i failed maths lol

Jess x
post #6 of 18
You aren't seriously asking for help are you? I thought you were just trying to show us how stupid we are in relation to your smarts.
post #7 of 18
If im honest when i looked at that first time i thought u were asking the fuctions of key board computer keys lol ... i am kinda dumb aye lol
Jess x?
post #8 of 18
My head's swimming
post #9 of 18
Thread Starter 
Quote:
Originally Posted by Yosemite View Post
You aren't seriously asking for help are you? I thought you were just trying to show us how stupid we are in relation to your smarts.
No I am very serious, I just can't figure those out. Its kind of funny because I was able to figure out the "harder" problems the teacher asked us.
post #10 of 18
I once took an aptitude test, and the tester said, "Mr. Blanche, you have the largest vocabulary of anyone we've ever tested, but we suggest that if you ever get a job where you have to handle numbers, you get a secretary."

I got decent grades in Math (and a good SAT score), but I never gave them a second chance to question me about it!
post #11 of 18
Thread Starter 
Quote:
Originally Posted by algebrapro18 View Post
Gift donations will be made to anyone who can help me with any of these:

A) For each part, find a function f: R -> R that has the desired properties: neither onto nor one-to-one

B)Under what conditions does A\\(A\\B) = B?

C)Define f:J -> N(natural numbers) where f(n) = 2n-1 for each n element of N(natural numbers).

D) Given A = {1,2,3,4,5}, B = {2,3,4,5,6,7} and C = {a,b,c,d,e} state an example of f: A ->B, g: B-> C, such that g(f(x))(the composition of g onto f) is 1-1 but g is not 1-1.

These are problems for homework that is due on Friday.
I got A, B, and D done so if anyone can help me with c then this will be done. IF anyone wants to see the solutions to A,B, and D I can also post them(I have a lot of free time today).
post #12 of 18
Omg I cant believe you guys don’t know this... It’s obvious the answer to all questions is 2!

Lol jk, who knows this stuff unless you are studying it?
post #13 of 18
And here I thought the answer to all of them was "42."
post #14 of 18
Quote:
Originally Posted by algebrapro18 View Post
I got A, B, and D done so if anyone can help me with c then this will be done. IF anyone wants to see the solutions to A,B, and D I can also post them(I have a lot of free time today).
for B

"Under what conditions..."

A=1
B is not zero

If I'm right too, do I still get a prize?

f(n)=2n-1 is the set of odd numbers. Positive and negative. 0 is not a natural number
post #15 of 18
Quote:
Originally Posted by butzie View Post
for B

"Under what conditions..."

A=1
B is not zero

If I'm right too, do I still get a prize?

f(n)=2n-1 is the set of odd numbers. Positive and negative. 0 is not a natural number
The last was the answer to C.

Now,that is worth 2 gifts.
post #16 of 18
Quote:
Originally Posted by mrblanche View Post
And here I thought the answer to all of them was "42."
That is, after all, the answer to, among others things, everything!
post #17 of 18
Quote:
Originally Posted by butzie View Post
The last was the answer to C.

Now,that is worth 2 gifts.
Hey! Algebrapro18! I solved 2 of the 4, including the one that you did not know. So, where is my gift? We are all curious here.
post #18 of 18
Thread Starter 
tell me how to send gifts and I will send you one...lol
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: The Cat Lounge
TheCatSite.com › Forums › General Forums › The Cat Lounge › A little help