Thread: Set problem

If , write down the following set;



The solution is but I can't get my head round why, could someone please explain this to me?

Cheers.

Hi.

Originally Posted by Gaz

If , write down the following set;



The solution is but I can't get my head round why, could someone please explain this to me?

Cheers.

It is ,
what is n? n = 0 or n = 1/2 or n = 1 or n = 3/2 or n = 2 or ... or n = 5

It should be

Check it for all n

n= 0:

2*0+1 = 1, is ? Yes it is! Therefor our solution contains 2*0+1 = 1

n = 1/2 :

2*1/2 + 1 = 2,
is 2 in A? Yes it is, therefor 2 is a solution, too
...
...
...
n = 5:

2*5 + 1 = 10+1 =11
Is 11 in A? No, its not! Therefore 11 is not a solution.

Do you think you find the other solutions by yourself?

Regards, Rapha

Right. I've got it now. I know what my problem was!!

Thanks!