Homework Answers
13 a. Let Let (and new be a sequence of reel numbers and let o cael....
13 a. Let Let (and new be a sequence of reel numbers and let o cael. Assume that for some NEN I calanl In), N. Prove that linn an 1 anti b. het (annsyl be the sequence defined by anti & Satan (i) Prove that to EN Lan 1.2. (11) Prove that and give its limit (an) converges C. Using the canchy's definition of continuity , prove the funetion g(x) = 2x+1 x-4 is continuous at l.
4. (20 pts) Let {xn} be a Cauchy sequence. Show that a) (5 pts) {xn} is...
4. (20 pts) Let {xn} be a Cauchy sequence. Show that a) (5 pts) {xn} is bounded. Hint: See Lecture 4 notes b) (5 pts) {Jxn} is a Cauchy sequence. Hint: Use the following inequality ||x| - |y|| < |x - y|, for all x, y E R. _ subsequence of {xn} and xn c) (5 pts) If {xnk} is a See Lecture 4 notes. as k - oo, then xn OO as n»oo. Hint: > d) (5 pts) If...
= 5a. (10 pts) Let fr : [0, 1] → R, fn(x) ce-nzº, for m =...
= 5a. (10 pts) Let fr : [0, 1] → R, fn(x) ce-nzº, for m = = 1, 2, 3, .... Check if the sequence (fn) is uniformly convergent. In the case (fr) is uniformly convergent find its limit. Justify your answer. Hint: First show that the pointwise limit of (fr) is f = 0, i.e., f (x) = 0, for all x € [0, 1]. Then show that 1 \Sn (r) – 5 (w) SS, (cm) - Vžne 1...
B2. (a) Let I denote the interval 0,1 and let C denote the space of continuous functions I-R. Def...
B2. (a) Let I denote the interval 0,1 and let C denote the space of continuous functions I-R. Define dsup(f,g)-sup |f(t)-g(t) and di(f.g)f (t)- g(t)ldt (f,g E C) tEI (i) Prove that dsup is a metric on C (ii) Prove that di is a metric on C. (You may use any standard properties of continuous functions and integrals, provided you make your reasoning clear.) 6 i) Let 1 denote the constant function on I with value 1. Give an explicit...
1. Let {n} be a sequence of non negative real numbers, and suppose that limnan =...
1. Let {n} be a sequence of non negative real numbers, and suppose that limnan = 0 and 11 + x2 + ... + In <oo. lim sup - n-00 Prove that the sequence x + x + ... + converges and determine its limit. Hint: Start by trying to determine lim supno Yn. What can you say about lim infn- Yn? 3 ) for all n Expanded Hint: First, show that given any e > 0 we have (...
Q4 20 Points Let (a.) 21 be a sequence of real numbers and a ER such...
Q4 20 Points Let (a.) 21 be a sequence of real numbers and a ER such that .-+ 4. No fles uploaded Q4.1 10 Points State the definition of " a Please select flies a ". Select files Q4.2 5 Points in 2020. Consider the sequence (6.) 1 given by bn = 24 in <2020 and be Using only the definition of convergence of sequences, show b a . Please select file Select file Q4.3 5 Points Let(). be a...
clean handwriting please Problem 1. Let {r,} be a sequence and L be a real number....
clean handwriting please
Problem 1. Let {r,} be a sequence and L be a real number. Give the definition that lim, In L. Prove from the definition of the limit, that 2n2 + 1 lim nx 4n? - n + 1 %3D by completing the following steps. (a) Using the fact that 1 <n < n?, estimate from above the expression 2n? +1 4n2 – n+1 b) Given e > 0 find a threshold N, so that for all n...
Write ‘T' for true or ‘F' for false. You do not need to show any work...
Write ‘T' for true or ‘F' for false. You do not need to show any work or justify your answers for this question. The questions are 2 points each. (a) __If (xn) is a convergent sequence (converging to a finite limit) and f:RR is a continuous function, then (f (xn)) is a convergent sequence. (b) _If (xn) is a Cauchy sequence with Yn € (0,1) and f :(0,1) + R is contin- uous, then (f(xn)) is also a Cauchy sequence....
PLEASE ANSWER ALL! SHOWS STEPS 2. (a) Prove by using the definition of convergence only, without using limit theo- (b) Prove by using the definition of continuity, or by using the є_ó property, that 3...
PLEASE ANSWER ALL! SHOWS STEPS
2. (a) Prove by using the definition of convergence only, without using limit theo- (b) Prove by using the definition of continuity, or by using the є_ó property, that 3. Let f be a twice differentiable function defined on the closed interval [0, 1]. Suppose rems, that if (S) is a sequence converging to s, then lim, 10 2 f (x) is a continuous function on R r,s,t e [0,1] are defined so that r...
12. Definition : Let Λ be a non-empty set. If for each a є Л there is a set Aa, the collection (A...
12. Definition : Let Λ be a non-empty set. If for each a є Л there is a set Aa, the collection (Aa : α Ε Λ is called an indexed collection of sets. The set A is called the index set. Traditionally Λ is often the natural numbers-you are probably pretty used to seeing sets indexed by the natural numbers but it can in fact be any other set! Here's the exercise: Let Л-R+ (meaning the positive real numbers,...
13 a. Let Let (and new be a sequence of reel numbers and let o cael. Assume that for some NEN I calanl In), N. Prove that linn an 1 anti b. het (annsyl be the sequence defined by anti & Satan (i) Prove that to EN Lan 1.2. (11) Prove that and give its limit (an) converges C. Using the canchy's definition of continuity , prove the funetion g(x) = 2x+1 x-4 is continuous at l.
4. (20 pts) Let {xn} be a Cauchy sequence. Show that a) (5 pts) {xn} is bounded. Hint: See Lecture 4 notes b) (5 pts) {Jxn} is a Cauchy sequence. Hint: Use the following inequality ||x| - |y|| < |x - y|, for all x, y E R. _ subsequence of {xn} and xn c) (5 pts) If {xnk} is a See Lecture 4 notes. as k - oo, then xn OO as n»oo. Hint: > d) (5 pts) If...
= 5a. (10 pts) Let fr : [0, 1] → R, fn(x) ce-nzº, for m = = 1, 2, 3, .... Check if the sequence (fn) is uniformly convergent. In the case (fr) is uniformly convergent find its limit. Justify your answer. Hint: First show that the pointwise limit of (fr) is f = 0, i.e., f (x) = 0, for all x € [0, 1]. Then show that 1 \Sn (r) – 5 (w) SS, (cm) - Vžne 1...
B2. (a) Let I denote the interval 0,1 and let C denote the space of continuous functions I-R. Define dsup(f,g)-sup |f(t)-g(t) and di(f.g)f (t)- g(t)ldt (f,g E C) tEI (i) Prove that dsup is a metric on C (ii) Prove that di is a metric on C. (You may use any standard properties of continuous functions and integrals, provided you make your reasoning clear.) 6 i) Let 1 denote the constant function on I with value 1. Give an explicit...
1. Let {n} be a sequence of non negative real numbers, and suppose that limnan = 0 and 11 + x2 + ... + In <oo. lim sup - n-00 Prove that the sequence x + x + ... + converges and determine its limit. Hint: Start by trying to determine lim supno Yn. What can you say about lim infn- Yn? 3 ) for all n Expanded Hint: First, show that given any e > 0 we have (...
Q4 20 Points Let (a.) 21 be a sequence of real numbers and a ER such that .-+ 4. No fles uploaded Q4.1 10 Points State the definition of " a Please select flies a ". Select files Q4.2 5 Points in 2020. Consider the sequence (6.) 1 given by bn = 24 in <2020 and be Using only the definition of convergence of sequences, show b a . Please select file Select file Q4.3 5 Points Let(). be a...
clean handwriting please
Problem 1. Let {r,} be a sequence and L be a real number. Give the definition that lim, In L. Prove from the definition of the limit, that 2n2 + 1 lim nx 4n? - n + 1 %3D by completing the following steps. (a) Using the fact that 1 <n < n?, estimate from above the expression 2n? +1 4n2 – n+1 b) Given e > 0 find a threshold N, so that for all n...
Write ‘T' for true or ‘F' for false. You do not need to show any work or justify your answers for this question. The questions are 2 points each. (a) __If (xn) is a convergent sequence (converging to a finite limit) and f:RR is a continuous function, then (f (xn)) is a convergent sequence. (b) _If (xn) is a Cauchy sequence with Yn € (0,1) and f :(0,1) + R is contin- uous, then (f(xn)) is also a Cauchy sequence....
PLEASE ANSWER ALL! SHOWS STEPS
2. (a) Prove by using the definition of convergence only, without using limit theo- (b) Prove by using the definition of continuity, or by using the є_ó property, that 3. Let f be a twice differentiable function defined on the closed interval [0, 1]. Suppose rems, that if (S) is a sequence converging to s, then lim, 10 2 f (x) is a continuous function on R r,s,t e [0,1] are defined so that r...
12. Definition : Let Λ be a non-empty set. If for each a є Л there is a set Aa, the collection (Aa : α Ε Λ is called an indexed collection of sets. The set A is called the index set. Traditionally Λ is often the natural numbers-you are probably pretty used to seeing sets indexed by the natural numbers but it can in fact be any other set! Here's the exercise: Let Л-R+ (meaning the positive real numbers,...
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