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6 Set Operations • R, the set of real numbers • Q, the set of rational...
List the numbers in the given set that are (a) Natural numbers, (b) Integers, (c) Rational...
List the numbers in the given set that are (a) Natural numbers, (b) Integers, (c) Rational numbers, (d) Irrational numbers, (e) Real numbers. A,-7, 9"-5.666 (the 6's repeat), 3%, 2,7 (a) Which of the following represents the natural number(s) in the given set? Select all that apply. O A. 2 B.-5.666...(the 6's repeat) □C. 4 O E. 7 G. There are no natural numbers in the set
2. [14 marks] Rational Numbers The rational numbers, usually denoted Q are the set {n E R 3p, q ZAq&0An= Note that...
2. [14 marks] Rational Numbers The rational numbers, usually denoted Q are the set {n E R 3p, q ZAq&0An= Note that we've relaxed the requirement from class that gcd(p, q) = 1. (a) Prove that the sum of two rational numbers is also a rational number (b) Prove that the product of two rational numbers is also a rational number (c) Suppose f R R and f(x)= x2 +x + 1. Show that Vx e R xe Qf(x) Q...
Suppose we tried to apply our real analysis definitions/methods to the set of rational numbers Q....
Suppose we tried to apply our real analysis definitions/methods
to the
set of rational numbers Q. In other words, in the definitions, we
only
consider rational numbers. E.g., [0, 1] now means [0, 1] ∩ Q, etc.
In
this setting:
(a) Find an open cover of [0, 1] that contains no finite subcover.
Hint:
Fix an irrational number α ∈ [0, 1] (as a subset of the reals
now!)
and for each (rational) q ∈ [0, 1] look for an...
2. Let X be a continuous random variable. Let R be the set of all real...
2. Let X be a continuous random variable. Let R be the set of all real numbers, let Z be the set of all integers, and let Q be the set of all rational numbers. Please calculate (1) P(X ? R), (2) P(X ? Z), and (3) P(X EQ)
Suppose we tried to apply our real analysis definitions/methods to the set of rational numbers Q....
Suppose we tried to apply our real analysis definitions/methods to the set of rational numbers Q. In other words, in the definitions, we only consider rational numbers. E.g., [0, 1] now means [0, 1] n Q, etc. In this setting: (a) Find an open cover of [0, 1] that contains no finite subcover. Hint: Fix an irrational number a € [0, 1] (as a subset of the reals now!) and for each (rational) qe [0, 1] look for an open...
6. Fix b (a) If m, n, p, q are integers, n > 0, q >...
6. Fix b (a) If m, n, p, q are integers, n > 0, q > 0, and r = mln-plg, prove that Hence it makes sense to define y (b")1/n. (b) Prove that b… = b,b" if r and s are rational. (c) If x is real, define B(x) to be the set of all numbers b', where t is rational and tSx. Prove that b-sup B(r) ris rational. Hence it b" = sup B(x) for every realx (d)...
Question 2 (20 Marks) Pull working must be shown for this question. Let Q denote the set of ratio...
Question 2 (20 Marks) Pull working must be shown for this question. Let Q denote the set of rational numbers and N the set of natural number:s For a given E N that is not a perfect square, consider the set of 2 x 2 matrices: Q(t) = tb a Determine if the system (Q(1), +,) is a field under the usual matrix addition +and multiplication operations over
Question 2 (20 Marks) Pull working must be shown for this question....
It would be very useful to have a theory about computability of functions R" -> R. Given that there Q.2 are an u...
It would be very useful to have a theory about computability of functions R" -> R. Given that there Q.2 are an uncountable number of real numbers, we would need to start with a definition of which numbers are themselves computable. A natural definition would be that a real number x is computable if it is the limit of computable sequence of rational numbers (so that we can compute it to whatever accuracy we like). More carefully V a Definition:...
1. Let Q be the set of polynomials with rational coefficients. You may assume that this...
1. Let Q be the set of polynomials with rational coefficients. You may assume that this is an abelian group under addition. Consider the function Ql] Q[x] given by p(px)) = p'(x), where we are taking the derivative. Show that is a group homomorphism. Determine the kernel of 2. Let G and H be groups. Show that (G x H)/G is isomorphic to H. Hint: consider defining a surjective homomorphism p : Gx HH with kernel G. Then apply the...
Determine whether the relation R on the set of all real numbers is reflexive, symmetric,...
Determine whether the relation R on the set of all real numbers is reflexive, symmetric, antisymmetric, and/or transitive, where (x, y) ∈ R if and only if a) x + y = 0 b) x= ±y. c) x-y is a rational number. d) = 2y. e) xy ≥ 0. f) xy = 0. g) x=l. h) r=1 or y = 1
List the numbers in the given set that are (a) Natural numbers, (b) Integers, (c) Rational numbers, (d) Irrational numbers, (e) Real numbers. A,-7, 9"-5.666 (the 6's repeat), 3%, 2,7 (a) Which of the following represents the natural number(s) in the given set? Select all that apply. O A. 2 B.-5.666...(the 6's repeat) □C. 4 O E. 7 G. There are no natural numbers in the set
2. [14 marks] Rational Numbers The rational numbers, usually denoted Q are the set {n E R 3p, q ZAq&0An= Note that we've relaxed the requirement from class that gcd(p, q) = 1. (a) Prove that the sum of two rational numbers is also a rational number (b) Prove that the product of two rational numbers is also a rational number (c) Suppose f R R and f(x)= x2 +x + 1. Show that Vx e R xe Qf(x) Q...
Suppose we tried to apply our real analysis definitions/methods
to the
set of rational numbers Q. In other words, in the definitions, we
only
consider rational numbers. E.g., [0, 1] now means [0, 1] ∩ Q, etc.
In
this setting:
(a) Find an open cover of [0, 1] that contains no finite subcover.
Hint:
Fix an irrational number α ∈ [0, 1] (as a subset of the reals
now!)
and for each (rational) q ∈ [0, 1] look for an...
2. Let X be a continuous random variable. Let R be the set of all real numbers, let Z be the set of all integers, and let Q be the set of all rational numbers. Please calculate (1) P(X ? R), (2) P(X ? Z), and (3) P(X EQ)
Suppose we tried to apply our real analysis definitions/methods to the set of rational numbers Q. In other words, in the definitions, we only consider rational numbers. E.g., [0, 1] now means [0, 1] n Q, etc. In this setting: (a) Find an open cover of [0, 1] that contains no finite subcover. Hint: Fix an irrational number a € [0, 1] (as a subset of the reals now!) and for each (rational) qe [0, 1] look for an open...
6. Fix b (a) If m, n, p, q are integers, n > 0, q > 0, and r = mln-plg, prove that Hence it makes sense to define y (b")1/n. (b) Prove that b… = b,b" if r and s are rational. (c) If x is real, define B(x) to be the set of all numbers b', where t is rational and tSx. Prove that b-sup B(r) ris rational. Hence it b" = sup B(x) for every realx (d)...
Question 2 (20 Marks) Pull working must be shown for this question. Let Q denote the set of rational numbers and N the set of natural number:s For a given E N that is not a perfect square, consider the set of 2 x 2 matrices: Q(t) = tb a Determine if the system (Q(1), +,) is a field under the usual matrix addition +and multiplication operations over
Question 2 (20 Marks) Pull working must be shown for this question....
It would be very useful to have a theory about computability of functions R" -> R. Given that there Q.2 are an uncountable number of real numbers, we would need to start with a definition of which numbers are themselves computable. A natural definition would be that a real number x is computable if it is the limit of computable sequence of rational numbers (so that we can compute it to whatever accuracy we like). More carefully V a Definition:...
1. Let Q be the set of polynomials with rational coefficients. You may assume that this is an abelian group under addition. Consider the function Ql] Q[x] given by p(px)) = p'(x), where we are taking the derivative. Show that is a group homomorphism. Determine the kernel of 2. Let G and H be groups. Show that (G x H)/G is isomorphic to H. Hint: consider defining a surjective homomorphism p : Gx HH with kernel G. Then apply the...
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