57. Find UA; and A; if for every positive integer i, a) A₁ = {-i, -i +1,...,-1, 0, 1, ..., i -1, i). b) A; = {-i, i). c) A = [-i, i], that is, the set of real numbers x with -i≤x≤i. d) A₁ = [i, co), that is, the set of real numbers x with x zi.
57. Find UA; and A; if for every positive integer i, a) A₁ = {-i, -i +1,...,-1, 0, 1, ..., i -1, i). b) A; = {-i, i). c) A = [-i, i], that is, the set of real numbers x with -i≤x≤i. d) A₁ = [i, co), that is, the set of real numbers x with x zi.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![57. Find UA; and
a) A; = (-i, -i + 1, ..., −1, 0, 1, ..., i -1, i).
b) A; = {-i, i).
c) A = [-i, i], that is, the set of real numbers x with
-i≤x≤i.
d) A, = [i, ∞o), that is, the set of real numbers x with
x ≥i.
A; if for every positive integer i,](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff5dde85c-3f71-429e-82d8-0343c173a1ea%2F9b30750b-871a-4983-8fa8-3ae4afa7f459%2Fuf29pde_processed.png&w=3840&q=75)
Transcribed Image Text:57. Find UA; and
a) A; = (-i, -i + 1, ..., −1, 0, 1, ..., i -1, i).
b) A; = {-i, i).
c) A = [-i, i], that is, the set of real numbers x with
-i≤x≤i.
d) A, = [i, ∞o), that is, the set of real numbers x with
x ≥i.
A; if for every positive integer i,
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