Homework Answers
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(6) Let a<b, and suppose the function f is integrable a, b. Show that for every...
(6) Let a<b, and suppose the function f is integrable a, b. Show that for every...
(6) Let a<b, and suppose the function f is integrable a, b. Show that for every infinite on IR such that g(x)= f (x) for all e [a,b]\ S subset SC [a, b), there is a function g: [a, b and g is not integrable. [ef: 7.1.3 in text. (7) Show directly that if the function f : [a,b possibly at one point o (a,b), thenf is integrable on fa, b). R is continuous everywhere in a, b) except
(6)...
R such that f is integrable on every [a,b] (6) Suppose f is a function and...
R such that f is integrable on every [a,b] (6) Suppose f is a function and a where b> a. Then we define the improper integral eb f(x)dx=lim | b-oo Ja f(x)da, if that limit exists. Assume that f(x) is continuous and monotonically decreasing on [0,00). Prove that Joof exists if and only if Σ f(n) converges. This result is known as the integral test for series convergence.
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...
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;...
Integral: If you know all about it you should be easy to prove..... Let f:[a,b]→R and...
Integral: If you know all about it you should be easy to prove..... Let f:[a,b]→R and g:[a,b]→R be two bounded functions. Suppose f≤g on [a,b]. Use the information to prove thatL(f)≤L(g)andU(f)≤U(g). Information: g : [0, 1] —> R be defined by if x=0, g(x)=1; if x=m/n (m and n are positive integer with no common factor), g(x)=1/n; if x doesn't belong to rational number, g(x)=0 g is discontinuous at every rational number in[0,1]. g is Riemann integrable on [0,1] based...
Answer C 6. Let f be a continuous function on [0, oo) such that 0 f(z)...
Answer C
6. Let f be a continuous function on [0, oo) such that 0 f(z) Cl- for some C,e> 0, and let a = fo° f(x) da. (The estimate on f implies the convergence of this integral.) Let fk(x) = kf(ka) a. Show that lim00 fk(x) = 0 for all r > 0 and that the convergence is uniform on [8, oo) for any 6> 0. b. Show that limk00 So ()dz = a. c. Show that lim00 So...
Let ⊂ be a rectangle and let f be a function which is integrable on R....
Let ⊂
be a
rectangle and let f be a function which is integrable on R. Prove
that the graph of f, G(f) := {(x, f(x)) ∈
: x ∈ }, is a
Jordan region and that it has volume 0 (as a subset of
).
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Problem 3: In this problem, we show that the product of integrable functions is integrable. Take...
Problem 3: In this problem, we show that the product of integrable functions is integrable. Take any integrable function : [a, b] → R. Let C be a constant satisfying (2) SC for all re(a,b). (a) Show that 1/(x)? - SW' <2C\/(x) - S() for r, y € (a,b). (bi Prove that is integrable. (c) If and g are integrable functions (a, 6] R. show that fe is integrable as well. Hint: first consider the function ( + 9)?.)
III. Let f,g be Riemann integrable on [a, b). Show that, for any k>0, f (x)g(x)dr. IV. Show that ...
analysis 2
III. Let f,g be Riemann integrable on [a, b). Show that, for any k>0, f (x)g(x)dr. IV. Show that eb 6
III. Let f,g be Riemann integrable on [a, b). Show that, for any k>0, f (x)g(x)dr. IV. Show that eb 6
Let {h} be a sequence ofRiemann integrable functions on [a,b], such that for each x, {h(x)) is a decreasing sequence. Suppose n) converges pointwise to a Riemann integrable function f Prove that f(x)...
Let {h} be a sequence ofRiemann integrable functions on [a,b], such that for each x, {h(x)) is a decreasing sequence. Suppose n) converges pointwise to a Riemann integrable function f Prove that f(x)dxf(x)dx. lim n00
Let {h} be a sequence ofRiemann integrable functions on [a,b], such that for each x, {h(x)) is a decreasing sequence. Suppose n) converges pointwise to a Riemann integrable function f Prove that f(x)dxf(x)dx. lim n00
(6) Let a<b, and suppose the function f is integrable a, b. Show that for every infinite on IR such that g(x)= f (x) for all e [a,b]\ S subset SC [a, b), there is a function g: [a, b and g is not integrable. [ef: 7.1.3 in text. (7) Show directly that if the function f : [a,b possibly at one point o (a,b), thenf is integrable on fa, b). R is continuous everywhere in a, b) except
(6)...
R such that f is integrable on every [a,b] (6) Suppose f is a function and a where b> a. Then we define the improper integral eb f(x)dx=lim | b-oo Ja f(x)da, if that limit exists. Assume that f(x) is continuous and monotonically decreasing on [0,00). Prove that Joof exists if and only if Σ f(n) converges. This result is known as the integral test for series convergence.
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...
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;...
Answer C
6. Let f be a continuous function on [0, oo) such that 0 f(z) Cl- for some C,e> 0, and let a = fo° f(x) da. (The estimate on f implies the convergence of this integral.) Let fk(x) = kf(ka) a. Show that lim00 fk(x) = 0 for all r > 0 and that the convergence is uniform on [8, oo) for any 6> 0. b. Show that limk00 So ()dz = a. c. Show that lim00 So...
Let ⊂
be a
rectangle and let f be a function which is integrable on R. Prove
that the graph of f, G(f) := {(x, f(x)) ∈
: x ∈ }, is a
Jordan region and that it has volume 0 (as a subset of
).
We were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this image
Problem 3: In this problem, we show that the product of integrable functions is integrable. Take any integrable function : [a, b] → R. Let C be a constant satisfying (2) SC for all re(a,b). (a) Show that 1/(x)? - SW' <2C\/(x) - S() for r, y € (a,b). (bi Prove that is integrable. (c) If and g are integrable functions (a, 6] R. show that fe is integrable as well. Hint: first consider the function ( + 9)?.)
analysis 2
III. Let f,g be Riemann integrable on [a, b). Show that, for any k>0, f (x)g(x)dr. IV. Show that eb 6
III. Let f,g be Riemann integrable on [a, b). Show that, for any k>0, f (x)g(x)dr. IV. Show that eb 6
Let {h} be a sequence ofRiemann integrable functions on [a,b], such that for each x, {h(x)) is a decreasing sequence. Suppose n) converges pointwise to a Riemann integrable function f Prove that f(x)dxf(x)dx. lim n00
Let {h} be a sequence ofRiemann integrable functions on [a,b], such that for each x, {h(x)) is a decreasing sequence. Suppose n) converges pointwise to a Riemann integrable function f Prove that f(x)dxf(x)dx. lim n00
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