problem 3 and 4 Problem 3: Prove that if a → oo then a is divergent....
3. Let (an)n1 be a sequence. o Prove that if (an)ni is monotone increasing and not bounded above, thenlimn00 an0o. o Show that removing the monotonicity hypothesis makes this statement false. (Give an example of a sequence that is not bounded above, and does not diverge to oo.)
Is the following series cos n convergent or divergent? Prove your result. 2 if Σ an with an > o is convergent, then is Σ a.. always convergent? Either prove it or give a counter example. 3 Is the following series convergent or divergent? if it is divergent, prove your result; if it is convergent, estimate the sum. 4 Is the following series 2n3 +2 nal convergent or divergent? Prove your result.
Please solve the problem step by step. Thank you very much!
3. a) Suppose (xn) is a sequence that converges to 0 and (yn) is a bounded sequence. Prove that (XnVn) converges. b) Give an example of a sequence (xn) that converges to x = 0 and a sequence on that is bounded between -1 and 1 such that that (xwyn) does not converge. c) Let xn be any series that converges absolutely and let yn be any series that...
Prove the statement. Please show all steps!!
If lim s" = oo and if (1.) is a bounded sequence, then lims, + In = 00 .
b) (10 pts) Let D(0, oo)) be the vector space of all bounded continuous functions from [0, oo) such that R If(x) dz 00. Give an example of a sequence {fn} of functions in D(0,00)) which (i) converges pointwise for E [0, oo) to the constant function f(z)0 (ii) does not converge to 0, neither with respect to the norm, nor the Hint: it may be helpful to contemplate the phrase "mass escaping to infinity". norm.
b) (10 pts) Let...
2. Prove convergent or divergent. If convergent, find limit. (a) The sequence in part (b) in problem number 1. (b) ak =3-(-1)", k > 0
6. Give an example of a non-constant sequence that satisfies the given conditions or explain why such a sequence does not exist: (1) {an} is bounded above but not convergent. (2) {an} is neither decreasing nor increasing but still converges. (3) {an} is bounded but divergent. (4) {an} is unbounded but convergent. (5) {an} is increasing and converges to 2.
problem 1and 2
Problem 1 [3 marks] Assume that the nth term in the sequence of partial sums for the series ,, is given below. Determine if the series is convergent or divergent. If the series is convergent determine the value of the series. a) Sn = 2-72 b) SEP Problem 2 [2 marks] Does the series (-1)" cos converge absolutely, or diverge?
Give an example of a sequence (a) with (a0, but an divergent example of a sequence (an) with (an) 0, but Σ an divergent
Question 1
1. [5 pts] Give a complete definition of lim f(x) = -oo if... 2. [25 pts] Give an example of each of the following, or state one or more theorems which show that such an example is impossible: a. A countable collection of nonempty closed proper subsets of R whose union is open. b. A nonempty bounded subset of R with no cluster points. c. A convergent sequence with two convergent subsequences with distinct limits. d. A function...