2. f: (R. d) -→ (R, do) is cont inuous at 2 a. True b. False

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.2: Mappings
Problem 27E: 27. Let , where and are nonempty. Prove that has the property that for every subset of if and...
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Let do be the usual metric in R and let d be the mapping d: R x R R defined by
d(r, y) =
|I - 1+|y- 1| if r#y
if r=y
Define the function f on R by f(x) = x.
1. The open ball of center0 and radius 2 in (R, d) is
a. B =0, 2[
b. B2= 1,2|
2. f: (R, d) - (R, do) is continuous at 2
a. True
b. False
3. Define the sequence of real numbers r
+2. n> 0, then r, tends to 2 in (R, do).
a. True
b. False
4. The sequence r, is a Cauchy sequence in (R. d).
a. True
b. False
5. The sequence r, is convergent in (R. d).
a. True
b. False
G. f: (R. do) (R.d) is contintuous at 2.
a. Irue
b. False
Transcribed Image Text:Let do be the usual metric in R and let d be the mapping d: R x R R defined by d(r, y) = |I - 1+|y- 1| if r#y if r=y Define the function f on R by f(x) = x. 1. The open ball of center0 and radius 2 in (R, d) is a. B =0, 2[ b. B2= 1,2| 2. f: (R, d) - (R, do) is continuous at 2 a. True b. False 3. Define the sequence of real numbers r +2. n> 0, then r, tends to 2 in (R, do). a. True b. False 4. The sequence r, is a Cauchy sequence in (R. d). a. True b. False 5. The sequence r, is convergent in (R. d). a. True b. False G. f: (R. do) (R.d) is contintuous at 2. a. Irue b. False
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