• Support PF! Buy your school textbooks, materials and every day products Here!

Determine whether set is closed, open or neither.

  • #1

Homework Statement


D1 = {(x,y) : x^2 + y^2 < 3, x+2y = 2}
D2={(x,y) : x^2 + y^2 > 2}
D3={(x,y) : x + 2y = 2}

Homework Equations




The Attempt at a Solution


D1 is neither, D2 is open and D3 is closed, am I right or wrong?
 

Answers and Replies

  • #2
PeroK
Science Advisor
Homework Helper
Insights Author
Gold Member
12,438
5,180
Right!
 

Related Threads on Determine whether set is closed, open or neither.

Replies
1
Views
779
Replies
4
Views
16K
Replies
7
Views
650
Replies
5
Views
455
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
4
Views
2K
Replies
9
Views
2K
  • Last Post
Replies
15
Views
7K
Top