Assume that there exists a function L : (0, oo) → R such that L'(x) =...
3] Let f : (0, oo) + R be differentiable on (0,0o). Define the difference function (af)(z) := f(z + 1)-f(x), x > 0. If linnof,(z-0, find linn (Sf)(x).
4. (a) Let A [0, oo) and let f.g:AR be functions which are continuous at 0 and are such that f(0) 9(0)-1. Show that there exists some δ > 0 such that ifTE 0,d) then (b) Consider the function 0 l if z e R is rational, if zER is irrational f(z) Show that limfr) does not exists for any ceR.
4. (a) Let A [0, oo) and let f.g:AR be functions which are continuous at 0 and are such...
Assume that f is a continuous function on R such that f() = A | $(e) dt for some A > 0 and all x, and [f(x) < M for some M > 0 and all x E R. a) Prove that f has continuous derivatives of all orders on R, and for k > 1 that f(k) (x) = A(f(k-1)(x + 1) – f(k-1)(x - 1)).
Let f : [a, b] → R and g : [a, b] → R be two continuous functions such that f(x) > g(x) for all x € (a,b]. 1. Show that there exists d > 0 such that f(x) > g(x) + 8 for all x € [a, b]. (Hint: introduce h := f -9] 2. Assume that g(x) > 0 for all x € [a, b]. Show that there exists k >1 such that f(x) > kg(x) for all...
1. Determine whether the statement is true or false. If false, explain why and correct the statement (T/FIf)exists, then lim ()f) o( T / F ) If f is continuous, then lim f(x) = f(r) (TFo)-L, then lim f(x)- lim F(x) "( T / F ) If lim -f(x)s lim. f(x) L, then lim f(x)s 1. "(T/F) lim. In x -oo . (T/F) lim0 ·(T / F ) The derivative f' (a) is the instantaneous rate of change of y...
2. Let f(x,y) = e-r-u, 0 < x < oo, 0 < y < oo, zero elsewhere, be the pdf of X and Y. Then if Z = X + Y, compute (a) P(Z 0). (b) P(Z 6) (c) P(Z 2) (d) What is the pdf of Z?
Real analysis
10 11 12 13 please
(r 2 4.1 Limit of Function 129 se f: E → R, p is a limit point of E, and limf(x)-L. Prove that lim)ILI. h If, in addition, )o for all x E E, prove that lim b. Prove that lim (f(x))"-L" for each n E N. ethe limit theorems, examples, and previous exercises to find each of the following limits. State which theo- rems, examples, or exercises are used in each case....
3. Suppose f : [0,) + R is a continuous function and that L limf(x) exists is a real number). Prove that f is uniformly continuous on (0,.). Suggestion: Let e > 0. Write out what the condition L = lim,+ f(t) means for this e: there erists M > 0 such that... Also write out what you are trying to prove about this e in this problem. Note that f is uniformly continuous on (0.M +1] because this is...
2. Assume that f: R" R is a C function and that there exists a vector - vER such that V.V(x) 0 for all x e R". Prove that for every x E R" and every t E R, f(x+Iv) f(x)
2. Assume that f: R" R is a C function and that there exists a vector - vER such that V.V(x) 0 for all x e R". Prove that for every x E R" and every t E R,...
5. A function f has Taylor series (at 0) f(x)=0+2x+ 4x2/2! + 3x3/3!+... Assume f−1 exists. Find as much of the Taylor series of f−1 (at 0) as you can. (Since you only know the first few terms of the Taylor series for f, you can only figure out f−1. (Hint: There are two ways of doing this problem. One is get the derivatives of f−1 from knowing the derivatives of f; we talked about the first derivative in January...