calculatingsomething
New member
- Joined
- Nov 11, 2009
- Messages
- 2
If I have
B = {{y,z) € R^2:x >0,z>0}, C={{y,z) € R^2:x <0,z>0} and D= {{y,z) € R^2: z>0},
so how I will define B intersection C, B union C, D difference B?
would it be something like;...
let's first examine the case B union C
B C
y is 1, z is 0 union y is -1, z is 1
and result is
y is 1, y is -1, z is 0, z is 1
and I can draw these inside the union circles B and C ?
how should I write those y is 1, y is -1, z is 0, z is 1
like; B U C:= {y,1, -1, z, 0} CORRECT?
B = {{y,z) € R^2:x >0,z>0}, C={{y,z) € R^2:x <0,z>0} and D= {{y,z) € R^2: z>0},
so how I will define B intersection C, B union C, D difference B?
would it be something like;...
let's first examine the case B union C
B C
y is 1, z is 0 union y is -1, z is 1
and result is
y is 1, y is -1, z is 0, z is 1
and I can draw these inside the union circles B and C ?
how should I write those y is 1, y is -1, z is 0, z is 1
like; B U C:= {y,1, -1, z, 0} CORRECT?