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
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Right!
 
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