Q59·Section II (Mathematics)·59 of 180Removing a discrete lattice or a parabola from the planeLet A={(x,y)∈R2:x,yA=\{(x,y)\in\mathbf R^2:x,yA={(x,y)∈R2:x,y are integers}\}} and B={(x,y)∈R2:y=x2}B=\{(x,y)\in\mathbf R^2:y=x^2\}B={(x,y)∈R2:y=x2}. Then: OptionsAR2−A\mathbf R^2-AR2−A is closedBR2−A\mathbf R^2-AR2−A is connectedCR2−B\mathbf R^2-BR2−B is closedDR2−B\mathbf R^2-BR2−B is connectedPick an option to check your answer.Show answerShow solution Report a problem with this question← Q58All questionsQ60 →Keyboard: A–D answer · S solution · ←/→ previous/next