In Euclidean metric space (R, I. I), prove that (1+1)→ 1 as n → ∞o in R.
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A: Prove or disprove that there exist rational numbers x, y in Q such that √11 = x+y√5.
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- [Type here] 21. Prove that ifand are integral domains, then the direct sum is not an integral domain. [Type here]the usual metric space defined by d(x,y)= x-y prove the four propertis of metric spaceA. Let H be the set of all points (x, y) in ℝ2 such that x2 + 3y2 = 12. Show that H is a closed subset of ℝ2 (considered with the Euclidean metric). Is H bounded?
- Show that the interval (a,b) in R with the discrete metric space is locally compact but not compact.A. Let H be the set of all points (x, y) in ℝ2 such that x2 + xy + 3y2 = 3. Show that H is a closed subset of ℝ2 (considered with the Euclidean metric). Is H bounded?A. Let H be the set of all points (x, y) in ℝ2 such that x2 + xy + 3y2 = 3. Show that H is a closed subset of ℝ2 (considered with the Euclidean metric). Is H bounded?Let (X,d) be a metric space. For x,y ∈ X, let D(x, y) = √d(x, y). Prove that D is a metric on X. Explain why, for a sequence (xn), n∈N in X, (xn) converges in the metric space (X,d) if and only if it converges in the metric space (X, D).
- Prove or disprove that (R, Tco-finite) is T2- spaceLet (X,d) be a metric space with the added condition that for any three points x,y,z in X, d(x,y) <= max{d(x,z),d(y,z)}.(a) Show that every triangle in X is isoceles.(b) An open ball in X with center u in X and radius r > 0 is defined as B(u;r) = {x in X | d(u,x) < r}. Show that every point in an open ball is a center for the open ball. [Hint: Part of your argument might include showing that if v in B(u;r), then B(v;r) = B(u;r).]1. Show that any interval (a,b) in R with the discrete metric is locaaly compact but not compact
- 2.) Let (S, d) be a metric space and suppose that ρ : S × S → R is defined byρ(x, y) = d(x, y)1 + d(x, y)for all points x, y ∈ S. Prove that (S, ρ) is a metric space, that it is bounded and thatρ(x, y) ≤ d(x, y) for all x, y ∈ S.A subset I of a metric space R with the usual metric is compact if and if only it is an interval True FalseLet f be a continuous mapping of a metric space X into metric space Y,g be a continuous mapping of metric space Y into metric space Z. Then gof ia a continues mapping of X into Z