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6. [251 Suppose D is a region in R', f a function on D and φ a function on aD. Prove that Robin problem Ou has...
6. The goal of this problem is to prove that a function is Riemann integrable if and only if its ...
exercice 6
6. The goal of this problem is to prove that a function is Riemann integrable if and only if its set of discontinuities has measure 0. So, assume f: a, bR is a bounded function. Define the oscillation of f at , w(f:z) by and for e >0 let Consider the following claims: i- Show that the limit in the definition of the oscillation always exists and that f is continuous at a if and only if w(f;...
differentiable function and there exists 0 <A < 1 (6) Suppose that f : R" -> R" is a such that |f'...
differentiable function and there exists 0 <A < 1 (6) Suppose that f : R" -> R" is a such that |f'(x)|< A, for all x E R". Prove that the function F(x)= x - f(x) maps R" one-to-one and onto R". (Suggestion: Use the Contraction Mapping Principle Why not use the Inverse Function Theorem?)
differentiable function and there exists 0
(7) In this problem let X denote the vector space C(0, 1) with the sup norm. (a) Given f e X, define d(f) = f2. : X → X is differentiable, and Prove that φ find φ'(f). (b) Given f e X, define 9(f...
(7) In this problem let X denote the vector space C(0, 1) with the sup norm. (a) Given f e X, define d(f) = f2. : X → X is differentiable, and Prove that φ find φ'(f). (b) Given f e X, define 9(f) = J0 [f(t)]2dt. Prove that Ψ : X → R is differentiable. and find Ψ(f).
(7) In this problem let X denote the vector space C(0, 1) with the sup norm. (a) Given f e X,...
Suppose f : D → R is a function and a ∈ R, and that...
4. Suppose f : D → R is a function and a ∈ R, and that for some β > 0, D contains (a-β, a + β)-{a} = (a-β, a) U (a, a + β). Prove that limx→a f(x) = L if and only if for all ε > 0 there exists δ > 0 such that if 0 < lx-al < δ and x ∈ D, then If(x) - L| < εDefinition: Suppose f : D → R is a function, a...
5, ( 10 pts.) Let f : R → R be a differentiable function and suppose that 2 for all xE R. Prove t...
5, ( 10 pts.) Let f : R → R be a differentiable function and suppose that 2 for all xE R. Prove that the equation f(cos) cos(f()) has a unique solution in R.
5, ( 10 pts.) Let f : R → R be a differentiable function and suppose that 2 for all xE R. Prove that the equation f(cos) cos(f()) has a unique solution in R.
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has a unique and continuous solution φ(t) on a s...
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has a unique and continuous solution φ(t) on a small interval containing to, φ(t) satisfies the initial condition φ(to) = to.
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has...
Consider the function φ : R- (a) What is ф(6)? (b) What is(-3)? (c) What is...
Consider the function φ : R- (a) What is ф(6)? (b) What is(-3)? (c) What is φ(R)? (d) What is 0-1 (16)? (e) What is φ-1 (1/4)? (f) What is ф_1(2, 32)? R defined by ф(x)
<C. Problem 1. For all x E R prove that r = 0 if V(e> 0) : Problem 2. For each of the below properties, name a function f: IRR that does not satisfy the property and prove your answer. (d)...
<C. Problem 1. For all x E R prove that r = 0 if V(e> 0) : Problem 2. For each of the below properties, name a function f: IRR that does not satisfy the property and prove your answer. (d) 3(e>0)
0) : Problem 2. For each of the below properties, name a function f: IRR that does not satisfy the property and prove your answer. (d) 3(e>0)
Problem 1. Consider the function f(x)- 3.12 show that f is Riemann integrable on [0.2] and use the definition to f...
Problem 1. Consider the function f(x)- 3.12 show that f is Riemann integrable on [0.2] and use the definition to find .后f(x)dr Problem 2. Consider the function -2, zEQ 2, O f(r) = Show that f is not Riemann integrable on 0,1 but s Reemann integrable on this interval. Problem 3. (a) Let f be a real-valued function on a, b] such thatf()0 for all c, where c E [a, b Prove that f is Riemann integrable on a, b...
Problem 6. (Mean Value Property) Let f : RR be a function with continuous second derivative. (a) Suppose f"( to f(...
Problem 6. (Mean Value Property) Let f : RR be a function with continuous second derivative. (a) Suppose f"( to f( ). 0 for all r E IR. P al rove that the average value of f on the interval a, bs equ f, onla b is equal tore !) Prove intervals la, b, the average。 (b) (Braus) Supposeerall Hint: To prove the second part, try to use the fundamental theorem of calculus or Jensen's inequality.
Problem 6. (Mean Value...
exercice 6
6. The goal of this problem is to prove that a function is Riemann integrable if and only if its set of discontinuities has measure 0. So, assume f: a, bR is a bounded function. Define the oscillation of f at , w(f:z) by and for e >0 let Consider the following claims: i- Show that the limit in the definition of the oscillation always exists and that f is continuous at a if and only if w(f;...
differentiable function and there exists 0 <A < 1 (6) Suppose that f : R" -> R" is a such that |f'(x)|< A, for all x E R". Prove that the function F(x)= x - f(x) maps R" one-to-one and onto R". (Suggestion: Use the Contraction Mapping Principle Why not use the Inverse Function Theorem?)
differentiable function and there exists 0
(7) In this problem let X denote the vector space C(0, 1) with the sup norm. (a) Given f e X, define d(f) = f2. : X → X is differentiable, and Prove that φ find φ'(f). (b) Given f e X, define 9(f) = J0 [f(t)]2dt. Prove that Ψ : X → R is differentiable. and find Ψ(f).
(7) In this problem let X denote the vector space C(0, 1) with the sup norm. (a) Given f e X,...
5, ( 10 pts.) Let f : R → R be a differentiable function and suppose that 2 for all xE R. Prove that the equation f(cos) cos(f()) has a unique solution in R.
5, ( 10 pts.) Let f : R → R be a differentiable function and suppose that 2 for all xE R. Prove that the equation f(cos) cos(f()) has a unique solution in R.
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has a unique and continuous solution φ(t) on a small interval containing to, φ(t) satisfies the initial condition φ(to) = to.
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has...
Consider the function φ : R- (a) What is ф(6)? (b) What is(-3)? (c) What is φ(R)? (d) What is 0-1 (16)? (e) What is φ-1 (1/4)? (f) What is ф_1(2, 32)? R defined by ф(x)
<C. Problem 1. For all x E R prove that r = 0 if V(e> 0) : Problem 2. For each of the below properties, name a function f: IRR that does not satisfy the property and prove your answer. (d) 3(e>0)
0) : Problem 2. For each of the below properties, name a function f: IRR that does not satisfy the property and prove your answer. (d) 3(e>0)
Problem 1. Consider the function f(x)- 3.12 show that f is Riemann integrable on [0.2] and use the definition to find .后f(x)dr Problem 2. Consider the function -2, zEQ 2, O f(r) = Show that f is not Riemann integrable on 0,1 but s Reemann integrable on this interval. Problem 3. (a) Let f be a real-valued function on a, b] such thatf()0 for all c, where c E [a, b Prove that f is Riemann integrable on a, b...
Problem 6. (Mean Value Property) Let f : RR be a function with continuous second derivative. (a) Suppose f"( to f( ). 0 for all r E IR. P al rove that the average value of f on the interval a, bs equ f, onla b is equal tore !) Prove intervals la, b, the average。 (b) (Braus) Supposeerall Hint: To prove the second part, try to use the fundamental theorem of calculus or Jensen's inequality.
Problem 6. (Mean Value...
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