4. (12 points) Let a ER be an irrational number, and let S = {m+na| m,...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
4. (12 points) Let a ER be an irrational number, and let S = {m+na| m, n = Z}. (a) Prove that ra + sb € S for all a, b E S and all r, s € Z. (b) Prove that there exists a strictly monotone increasing sequence of natural numbers {n} such that the sequence {na - [na]}=1 k=1 converges. (c) Prove that for every e > 0, there exists an element 7 € S such that 0 < T < E. (d) Prove that S is dense in R; that is, for every x ER and every > 0, there exists a point y ES such that x - y < e. Hint. [x/T] ≤x/T ≤ (x/T] +1. 4. (12 points) Let a ER be an irrational number, and let S = {m+na| m, n = Z}. (a) Prove that ra + sb € S for all a, b E S and all r, s € Z. (b) Prove that there exists a strictly monotone increasing sequence of natural numbers {n} such that the sequence {na - [na]}=1 k=1 converges. (c) Prove that for every e > 0, there exists an element 7 € S such that 0 < T < E. (d) Prove that S is dense in R; that is, for every x ER and every > 0, there exists a point y ES such that x - y < e. Hint. [x/T] ≤x/T ≤ (x/T] +1.
Expert Answer:
Answer rating: 100% (QA)
a Since a b S a mna and b mnb for some m n Z Then rasb rmsnasnb r... View the full answer
Related Book For
Discrete and Combinatorial Mathematics An Applied Introduction
ISBN: 978-0201726343
5th edition
Authors: Ralph P. Grimaldi
Posted Date:
Students also viewed these accounting questions
-
A monotone sequence in R converges if and only if it is bounded. [If xn is a bounded monotone sequence, show that xn sup{xn}.]
-
Let {bn} a sequence of positive numbers that converges to 1/2. Determine whether the given series is absolutely convergent. ba cos m
-
Let E Rn and suppose that D is dense in E (i.e., that D E and = E). If f: D Rm is uniformly continuous on D, prove that f has a continuous extension to E; that is, prove that there is a...
-
Question 13 Case Study - Little Pear Administration Pty Ltd (LPA) You are the payroll officer for Little Pear Administration Pty Ltd (LPA). Debra Foy is a company employee and has approached you with...
-
When does it make sense to compute the contribution margin per unit of a particular resource in making short-term decisions?
-
What is the difference between the Children's Online Privacy Protection Act and the Children's Internet Protection Act?
-
Estimate the work done by the force plotted in Figure P9.46 for an object displaced from \(x=1.0 \mathrm{~m}\) to \(x=3.0 \mathrm{~m}\). Data from Figure P9.46 F(N) 3 2 1 2 3 x (m) 4
-
A real estate developer is considering three possible projects: a small apartment complex, a small shopping center, and a mini-warehouse. Each of these requires different funding over the next two...
-
The brute force algorithm for string matching is given below: ALGORITHM Brute Force String Match(T[0..n-1], P[0..m-1]) //Implements brute-force string matching //Input: An array T[0..n-1] of n...
-
The graph in Figure 1.38 shows the distance versus time for an elevator as it moves up and down in a building. Compute the elevators velocity at the times marked a, b, and c. 32 28 24 20 16 12 a 28...
-
The pitch presentation requires students to present a persuasive pitch demonstrating the key strategic promotional tools to be utilised in the launch of their brand. The pitch should include...
-
Box Ca. has a balance in the alowance for doubtful debts account of $8,020 Credit. Before the adjustment at the year ended 30 June 2022, no bad debts are expected to be recovered. Aged Schedals of...
-
Calculate the surface energy of the (100) face of a bcc material whose nearest-neighbor distance is 4 and whose cohesive energy between the atoms is = 1.5 eV/atom. Use the bond-breaking model and...
-
(a) Let p be an odd prime and G a group of order 2p. Show that G is either cyclic i. e. G=Z, or G = Dp. What can you deduce from this result? (b) Let G be a group with subgroups H and K such that HK...
-
Yant: A block of mass m=6,8 kg is on a frictionless inclined plane (incline angle is 0=16). An external force F = 6,2 N is applied parallel to the inclined surface. Determine the magnitude of the...
-
KT Option Strategies is evaluating 90 day maturity Aussies calls and puts. Aussies spot and forward are both priced in American terms. The option information is below. Option Put on Aussies Call on...
-
In a rapidly evolving digital landscape, how can marketers effectively adapt their marketing strategies to leverage emerging technologies such as virtual reality (VR), augmented reality (AR), or...
-
After Theorem 1.5 we note that multiplying a row by 0 is not allowed because that could change a solution set. Give an example of a system with solution set S0 where after multiplying a row by 0 the...
-
For the relation R in Example 7.13, let f: Z+ R where f(n) = n. (a) Find three elements f1, f2, f3 F such that f1 R f and f R f1, for all 1 i 3. (b) Find three elements g1, g2, g3 F such that g1...
-
Let A, B, C be independent events taken from a sample space If Pr(A) = 1/8, Pr(B) = 1/4, and Pr(A U B U C) = 1/2, find Pr(C). S.
-
A six-character variable name in a certain version of ANSI FORTRAN starts with a letter of the alphabet. Each of the other five characters can be either a letter or a digit. (Repetitions are...
-
An economist believes that the median income of lawyers who recently graduated from law school is more than \(\$ 64,000\). He queries a random sample of 12 lawyers and obtains the accompanying data....
-
One important variable to consider in trading stock is the daily volume. Volume is measured in number of shares traded in the stock. Stocks with lower volume tend to have more variability in the...
-
The median is less than 8 . An analysis of the data reveals that there are 10 minus signs and 8 plus signs. Use the sign test to test the given alternative hypothesis at the \(\alpha=0.05\) level of...
Study smarter with the SolutionInn App