
Suppose (Sn) is a sequence such that, for all n 1, we have 1 Sn+1 –...
a. 1 4. Let Sn =EX=1 Show that In(n+1) < Sn S 1+In n b. Show that {an} = {Sn - In n} Show that sequence {an} converges C.
Problem 2 Show that if the sequence of numbers (an)n-1 satisfies Inlan) < oo, then the series In ancos(nx) converges uniformly on [0, 27). This means, the partial sums Sn(x) = ) ancos(nx) define a sequence of functions {sn} = that converges uniformly on [0, 271]. Hint: First show that the sequence is Cauchy with respect to || · ||00.
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 (...
In questions 1-8, find the limit of the sequence. sin n cos n 2. 37 /n sin n 3. 4. cos rn 5. /n sin n o cos n n! 9. If c is a positive real number and lan) is a sequence such that for all integer n > 0, prove that limn →00 (an)/n-0. 10. If a > 0, prove that limn+ (sin n)/n 0 Theorem 6.9 Suppose that the sequence lan) is monotonic. Then ta, only if...
Suppose that and are Cauchy sequences. Show that the sequence is also Cauchy. Sn We were unable to transcribe this image(Sn-tn
Suppose that a sequence {Zn} satisfies Izn+1-Znl < 2-n for all n e N. Prove that {z.) is Cauchy. Is this result true under the condition Irn +1-Fml < rt Let xi = 1 and xn +1 = (Zn + 1)/3 for all n e N. Find the first five terms in this sequence. Use induction to show that rn > 1/2 for all n and find the limit N. Prove that this sequence is non-increasing, convergent,
Show that a bounded and monotone sequence converges. Here a
sequence
is called monotone, if it is either monotone increasing, that is
for all
or monotone decreasing, in which case
for all
.
in Sn=1 An+1 > an neN an+1 < an We were unable to transcribe this image
Find the imin and limsup oP the followi uences denoted lou Sn n+1 (b) sn = n (1+(-4)^) + n.)((-1) ) (c) sn=봬 , where ynis - bounded (d) sn =n2. sequence.
Find the imin and limsup oP the followi uences denoted lou Sn n+1 (b) sn = n (1+(-4)^) + n.)((-1) ) (c) sn=봬 , where ynis - bounded (d) sn =n2. sequence.
3.) Let ak E R with ak > 0 for all k E N. Suppose Σ㎞iak converges. Show that Σί1bk (By definition, for a sequence (ck), we say liCkoo if, for all M ER with Hint: Show that there exists (Ni))ไ1 with N > Nj for all j E N, such that bk there exists a sequence (bk)k of real numbers such that lim converges = oo and M >0, there exists N E N such that ck > M...
4. Suppose (fr)nen is a sequence of functions on [0, 1] such that each fn is differentiable on (0,1) and f(x) < 1 for all x € (0,1) and n e N. (a) If (fn (0))nen converges to a number A, prove that lim sup|fn(x) = 1+|A| for all x € [0, 1]. n-too : (b) Suppose that (fr) converges uniformly on [0, 1] to a function F : [0, 1] + R. Is F necessarily differentiable on (0,1)? If...