49. Let {x,}=1 be a sequence of real numbers such that xn Calculate lim,∞ exp(cos(x, – 1) – 1). (Proof is not requi
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- Define the sequence {Sn} by Sn= [ 1 / (2)(1) ] + [ 1 / (3)(2) ] + ............. + [ 1 / (n+1)(n) ] Prove that Limn→∞ Sn = 1.Let n be a positive integer. For which n are the two infinite one-sided limits limx→0±1/xn^n equal?(i) Let gn(x) =1/n(1 + x2) For any fixed x ∈ R, we can see that limgn(x) = 0 so that g(x) = 0 is the pointwise limit of the sequence (gn) on R. Is this convergence uniform? The observation that 1/(1 + x2) ≤ 1 for all x ∈ R implies that .
- Suppose that F(u) denotes the DFT of the sequence of f(x)={1, 2, 3, 4}? What is the value of F(14)? (Hint: DFT periodicity)Suppose that {xn} is a sequence of real numbers satisfying lim (as n→∞) xn = 1. prove that lim (as n→∞) (1 + 2xn) = 3. prove this don't calculate limit.Suppose that (sn) and (tn) are sequences so that sn = tn except for finitely many values of n. Using the definition of limit, explain why if limn → ∞ sn = s, then also limn → ∞ tn = s.
- 1. Use the definition of the limit ( epsolon - delta ) to show thatlim of 1/z as z approaches -i2. Give the condition which ensure that |ez| < 1 where z in C.If (an) has limit −1 and (bn) tends to infinity, does it follow that only finitely many terms of (anbn) are positive?Prove that the sequence {cn} converges to c if and only if the sequence {cn- c} converges to 0.