![Consider the bounded function f : [0, 1] + R defined on the closed interval [0, 1] by 0 т f(x) = { 15 if x is irrational, if](http://img.homeworklib.com/questions/1b5af060-cd38-11ea-98e2-5fc8d49d72f7.png?x-oss-process=image/resize,w_560)
Please give me the correct solution.
Homework Answers
The function is integrable.
Firstly, notice that whatever the partition may be, the lower sum will always be zero since function attains 0 on irrational values, and we have at least one irrational point in any interval. So, the supremum of the lower sums is zero as well.
Now, we need to see if the infimum of the upper sums is zero as well, in which case it will equal the supremum of the lower sums, which is already zero as we have seen above. Now, let's take a partition {1/2,1/4,1/8,1/16,...,1/(2^n)}. Notice that as we increase n, the upper sum tends to zero. So, we have proved that the infimum of the upper sums is zero.
Now we know that if the infimum of the upper sums equals the supremum of the lower sums (when they exist, i.e. are finite) that is the value of the integral of the function. So, answer to the second part (b2) is zero.
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Please give me the correct solution.
Consider the bounded function f : [0, 1] + R...
Please answer it step by step and Question 2. uniformly converge is defined by *f=0* clear...
Please answer it step by step and Question 2. uniformly
converge is defined by *f=0* clear handwritten,
please, also, beware that for the x you have 2 conditions , such as
x>n and 0<=x<=n
1- For all n > 1 define fn: [0, 1] → R as follows: (i if n!x is an integer 10 otherwise Prove that fn + f pointwise where f:[0,1] → R is defined by ſo if x is irrational f(x) = 3 11 if x...
Problem 4: Let f: [0, 1] → R be an integrable function that is continuous at...
Problem 4: Let f: [0, 1] → R be an integrable function that is continuous at 0. Prove that lim f(") dx = f(0). n+Jo [ Hint: there are several approaches. It might help to first show that for a fixed 0 <b< 1, we have limn700 Sº f(x) dx = b. f(0). ]
Please give clear detailed explanation. Let a 0 and suppose that the function f is Riemann...
Please give clear detailed explanation.
Let a 0 and suppose that the function f is Riemann integrable on [0, a]. Prove that f(a-x) dx = 2S0[f(x) + f(a- 1 ca f(x) dx = x)j dx. Prove that f' in(1 + tan(a) tan(x)) dx = a ln(sec(a)) (0<a<T/2) Let f: [0, 1] → R be defined by f(x) = VX , 0 1 , and let x 2 n-1,2 be a partition of [0, 1]. Calculate lRll and show that lim...
1. Let f:R → R be the function defined as: 32 0 if x is rational...
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Consider the function f : R → R defined by f(x) = !x if x is...
Consider the function f : R → R defined by
f(x) = !x if x is rational
−x if x is irrational.
Find all c ∈ R at which f is continuous.
Consider the function f :R → R defined by .. х if x is rational f(x) = -2 if x is irrational. Find all c ER at which f is continuous.
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solve #5 only please
5 Prove that the function f in problem 4 is integrable and sf = 0. Suggestion: Use the suggestion for problem 4(a) to show that given €>0, there is a partition Pof [0, 1] with Uff, P) < 2€ , while Laf, P) =0. Do this by enclosing the points of the finite set where f(x) 2e in a finite set of disjoint closed intervals, each contained in (0,1), with the sum of the lengths <€....
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Please all thank you Exercise 25: Let f 0,R be defined by f(x)-1/n, m, with m,nENand n is the minimal n such that m/n a) Show that L(f, P)0 for all partitions P of [0, 1] b) Let mE N. Show that t...
Please all thank you
Exercise 25: Let f 0,R be defined by f(x)-1/n, m, with m,nENand n is the minimal n such that m/n a) Show that L(f, P)0 for all partitions P of [0, 1] b) Let mE N. Show that the cardinality of the set A bounded by m(m1)/2. e [0, 1]: f(x) > 1/m) is c) Given m E N construct a partition P such that U(f, Pm)2/m. d) Show that f is integrable and compute Jo...
1 Fix an integer N > 1, and consider the function f : [0,1] - R...
1 Fix an integer N > 1, and consider the function f : [0,1] - R defined as follows: if 2 € (0,1) and there is an integer n with 1 <n<N such that nx € Z, choose n with this property as small as possible, and set f(x) := otherwise set f(x):= 0. Show that f is integrable, and compute Sf. (Hint: a problem from Homework Set 7 may be very useful for 0 this!)
Please answer it step by step and Question 2. uniformly
converge is defined by *f=0* clear handwritten,
please, also, beware that for the x you have 2 conditions , such as
x>n and 0<=x<=n
1- For all n > 1 define fn: [0, 1] → R as follows: (i if n!x is an integer 10 otherwise Prove that fn + f pointwise where f:[0,1] → R is defined by ſo if x is irrational f(x) = 3 11 if x...
Problem 4: Let f: [0, 1] → R be an integrable function that is continuous at 0. Prove that lim f(") dx = f(0). n+Jo [ Hint: there are several approaches. It might help to first show that for a fixed 0 <b< 1, we have limn700 Sº f(x) dx = b. f(0). ]
Please give clear detailed explanation.
Let a 0 and suppose that the function f is Riemann integrable on [0, a]. Prove that f(a-x) dx = 2S0[f(x) + f(a- 1 ca f(x) dx = x)j dx. Prove that f' in(1 + tan(a) tan(x)) dx = a ln(sec(a)) (0<a<T/2) Let f: [0, 1] → R be defined by f(x) = VX , 0 1 , and let x 2 n-1,2 be a partition of [0, 1]. Calculate lRll and show that lim...
1. Let f:R → R be the function defined as: 32 0 if x is rational if x is irrational Prove that lim -70 f(x) = 0. Prove that limc f(x) does not exist for every real number c + 0. 2. Let f:R + R be a continuous function such that f(0) = 0 and f(2) = 0. Prove that there exists a real number c such that f(c+1) = f(c). 3 Let f. (a,b) R be a function...
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Consider the function f : R → R defined by
f(x) = !x if x is rational
−x if x is irrational.
Find all c ∈ R at which f is continuous.
Consider the function f :R → R defined by .. х if x is rational f(x) = -2 if x is irrational. Find all c ER at which f is continuous.
solve #5 only please
5 Prove that the function f in problem 4 is integrable and sf = 0. Suggestion: Use the suggestion for problem 4(a) to show that given €>0, there is a partition Pof [0, 1] with Uff, P) < 2€ , while Laf, P) =0. Do this by enclosing the points of the finite set where f(x) 2e in a finite set of disjoint closed intervals, each contained in (0,1), with the sum of the lengths <€....
Please all thank you
Exercise 25: Let f 0,R be defined by f(x)-1/n, m, with m,nENand n is the minimal n such that m/n a) Show that L(f, P)0 for all partitions P of [0, 1] b) Let mE N. Show that the cardinality of the set A bounded by m(m1)/2. e [0, 1]: f(x) > 1/m) is c) Given m E N construct a partition P such that U(f, Pm)2/m. d) Show that f is integrable and compute Jo...
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