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Question 16 (1 point) For two bounded sequences of real numbers {Xn } n=1 and {yn}"=1,...
2.13.4 2.13.5 Show that lim supno (-X) = -(liminf ,-Xn). If two sequences {an) and {bn}...
2.13.4 2.13.5 Show that lim supno (-X) = -(liminf ,-Xn). If two sequences {an) and {bn} satisfy the inequality an <b, for all sufficiently large n, show that limsupan Slim sup bn and liminfa, <liminf bn. 100 2.13.6 Show that lim, 100 Xn = o if and only if lim sup.Xn = liminf xn = c. n-00 2.13.7 Show that if lim sup a n = L for a finite real number L and € > 0, then an >...
5. Let {xn} and {yn} be sequences of real numbers such that x1 = 2 and...
5. Let {xn} and {yn} be sequences of real numbers such that x1 =
2 and y1 = 8 and for n = 1,2,3,···
x2nyn + xnyn2 x2n + yn2 xn+1 = x2 + y2 and yn+1 = x + y .
nn nn
(a) Prove that xn+1 − yn+1 = −(x3n − yn3 )(xn − yn) for all
positive integers n.
(xn +yn)(x2n +yn2) (b) Show that 0 < xn ≤ yn for all positive
integers n.
Hence, prove...
{x_n} and {y_n} are sequences of positive real numbers AC fn→oo > O, prove tha m...
{x_n} and {y_n} are sequences of positive real numbers
AC fn→oo > O, prove tha m in yn lim xn 0 implies lim yn_0
(1) Suppose f :(M, d) + (N,0) is not uniformly continuous. Show that there exist an...
(1) Suppose f :(M, d) + (N,0) is not uniformly continuous. Show that there exist an a > 0 and sequences (Xn) and (yn) in M such that d(Ion, yn) < and o(f(xn), f(n)) > € VnE N. (Hint: Negation of the definition of uniform continuity.)
Let (In), and (yn).m-1 be sequences such that Pr – yn| < 1/n for all n....
Let (In), and (yn).m-1 be sequences such that Pr – yn| < 1/n for all n. Use the definition of convergence to prove that, if (2n)_1 is convergent, then (Yn)-1 is convergent.
ANSWER 1 & 2 please. Show work for my understanding and upvote. THANK YOU!! Problem 1....
ANSWER 1 & 2 please. Show work for my understanding and
upvote. THANK YOU!!
Problem 1. Let {x,n} and {yn} be two sequences of real numbers such that xn < Yn for all n E N are both convergent, then lim,,-t00 Xn < lim2+0 Yn (a) (2 pts) Prove that if {xn} and {yn} Hint: Apply the conclusion of Prob 3 (a) from HW3 on the sequence {yn - X'n}. are not necessarily convergent we still have: n+0 Yn and...
1,2 Let (an)nen be a sequence of real numbers that is bounded from above. Consider L...
1,2
Let (an)nen be a sequence of real numbers that is bounded from above. Consider L := lim suPn7o An, prove that: For all e > 0 there are only finitely many n for which an > L + €. For all e > 0 there are infinitely many n for which an > L - €.
1. [4-+6+6-16 points Let /°0 denote the vector space of bounded sequences of real numbers, with a...
1. [4-+6+6-16 points Let /°0 denote the vector space of bounded sequences of real numbers, with addition and scalar multiplication defined componentwise. Define a norm Il on by Il xl = suplx! < oo where x = (x1,x2, 23, . .. ) iEN (a) Prove that is complete with respect to the norm | . (b) Consider the following subspaces of 1o i) c-the space of convergent sequences; (i) co-the space of sequences converging to 0; (iii) coo- the space...
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 (...
The sequence (Un) of positive real numbers satisfies the relationship In-1XnXn+1 = 1 for all n...
The sequence (Un) of positive real numbers satisfies the relationship In-1XnXn+1 = 1 for all n > 2. If x1 = 1 and x2 = 2, what are the values of the next few terms? What can you say about the sequence? What happens for other starting values? The sequence (yn) satisfies the relationship Yn-1Yn+1 + Yn = 1 for all n > 2. If y1 = 1 and Y2 = 2, what are the values of the next few...
2.13.4 2.13.5 Show that lim supno (-X) = -(liminf ,-Xn). If two sequences {an) and {bn} satisfy the inequality an <b, for all sufficiently large n, show that limsupan Slim sup bn and liminfa, <liminf bn. 100 2.13.6 Show that lim, 100 Xn = o if and only if lim sup.Xn = liminf xn = c. n-00 2.13.7 Show that if lim sup a n = L for a finite real number L and € > 0, then an >...
5. Let {xn} and {yn} be sequences of real numbers such that x1 =
2 and y1 = 8 and for n = 1,2,3,···
x2nyn + xnyn2 x2n + yn2 xn+1 = x2 + y2 and yn+1 = x + y .
nn nn
(a) Prove that xn+1 − yn+1 = −(x3n − yn3 )(xn − yn) for all
positive integers n.
(xn +yn)(x2n +yn2) (b) Show that 0 < xn ≤ yn for all positive
integers n.
Hence, prove...
{x_n} and {y_n} are sequences of positive real numbers
AC fn→oo > O, prove tha m in yn lim xn 0 implies lim yn_0
(1) Suppose f :(M, d) + (N,0) is not uniformly continuous. Show that there exist an a > 0 and sequences (Xn) and (yn) in M such that d(Ion, yn) < and o(f(xn), f(n)) > € VnE N. (Hint: Negation of the definition of uniform continuity.)
Let (In), and (yn).m-1 be sequences such that Pr – yn| < 1/n for all n. Use the definition of convergence to prove that, if (2n)_1 is convergent, then (Yn)-1 is convergent.
ANSWER 1 & 2 please. Show work for my understanding and
upvote. THANK YOU!!
Problem 1. Let {x,n} and {yn} be two sequences of real numbers such that xn < Yn for all n E N are both convergent, then lim,,-t00 Xn < lim2+0 Yn (a) (2 pts) Prove that if {xn} and {yn} Hint: Apply the conclusion of Prob 3 (a) from HW3 on the sequence {yn - X'n}. are not necessarily convergent we still have: n+0 Yn and...
1,2
Let (an)nen be a sequence of real numbers that is bounded from above. Consider L := lim suPn7o An, prove that: For all e > 0 there are only finitely many n for which an > L + €. For all e > 0 there are infinitely many n for which an > L - €.
1. [4-+6+6-16 points Let /°0 denote the vector space of bounded sequences of real numbers, with addition and scalar multiplication defined componentwise. Define a norm Il on by Il xl = suplx! < oo where x = (x1,x2, 23, . .. ) iEN (a) Prove that is complete with respect to the norm | . (b) Consider the following subspaces of 1o i) c-the space of convergent sequences; (i) co-the space of sequences converging to 0; (iii) coo- the space...
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 (...
The sequence (Un) of positive real numbers satisfies the relationship In-1XnXn+1 = 1 for all n > 2. If x1 = 1 and x2 = 2, what are the values of the next few terms? What can you say about the sequence? What happens for other starting values? The sequence (yn) satisfies the relationship Yn-1Yn+1 + Yn = 1 for all n > 2. If y1 = 1 and Y2 = 2, what are the values of the next few...
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