What is quotient: Definition and 355 Discussions

In arithmetic, a quotient (from Latin: quotiens 'how many times', pronounced ) is a quantity produced by the division of two numbers. The quotient has widespread use throughout mathematics, and is commonly referred to as the integer part of a division (in the case of Euclidean division), or as a fraction or a ratio (in the case of proper division). For example, when dividing 20 (the dividend) by 3 (the divisor), the quotient is "6 with a remainder of 2" in the Euclidean division sense, and



6



2
3





{\displaystyle 6{\tfrac {2}{3}}}
in the proper division sense. In the second sense, a quotient is simply the ratio of a dividend to its divisor.

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  1. D

    How to Correctly Apply the Quotient Rule in Differentiation?

    Homework Statement X / 1+sinX The Attempt at a Solution Quotient rule (1+sinX)(1)-X(1+cosX) / (1+sinX)2 To: 1+sinX-X-XcosX / (1+sinX)2 But when I look at the answer in the back of the book, it's wrong.
  2. D

    Find derivative using Quotient rule

    Homework Statement Differentiate f(x) = 6-5x-x2 / x2-1 ------- A) -5-5x / x2-1 B) 5 / (x+1)2 C) -5-5x / (x2-1)2 D) -5 / (x+1)2 E) -5+5x / x2-1 F) None of the above The Attempt at a Solution (x2)(-5-2x)-(6-5x-x2)(2x) / (x2-1)2 Simplified to: 5x2-10x+5 / x4-2x2+1...
  3. quasar987

    The universal property characterizing the quotient topology

    I am trying to show that if X is a topological space, ~ an equivalence relation on X and q:X-->X/~ the quotient map (i.e. q(x)=[x]), then the quotient topology on X/~ (U in X/~ open iff q^{-1}(U) open in X) is characterized by the following universal property: "If f:X-->Y is continuous and...
  4. R

    How to find the difference quotient and simplify the answer

    Homework Statement find the difference quotient and simply your answer. f(t)=1/t, [f(t)-f(1)]/t-1, t doesn't equal 1 Homework Equations the book says the answer is -1/t, t doesn't equal 1 The Attempt at a Solution (1/t-1)/t-1 (1/t-t/t)/t-1 (-1t/t)/t-1 -1/t-1...
  5. M

    Equivalence Relations and Quotient Sets - Verifying a Claim

    I have a question... "Is the quotient set of a set S relative to a equivalence relation on S a subset of S?" I suppose "no",since the each member of the quotient set is a subset of S and consequently it is a subset of the power set of S,but I have e book saying that "yes",I am a bit...
  6. B

    Derivative of quotient with same variables on top and bottom

    Homework Statement a=g.[(M-m)/(M+m)] how do i go about finding the partial derivative wrt m? Homework Equations The Attempt at a Solution i started by rearranging it to the form a=g.(M-m)(M+m)^-1, i used the chain rule to find the derivative of (M+m)^-1 to be -(M+m)^-2 but...
  7. MathematicalPhysicist

    Proof of Quotient Map Q: A -> R for Exam Review

    Im reviewing material for the exam and came across this question: Let pi_1:RxR->R be the projection on the first coordinate. Let A be the subspace of RxR consisitng of all points (x,y) s.t either x>=0 or (inclusive or) y=0. let q:A->R be obtained by resticting pi_1. show that q is quotient...
  8. M

    Understanding Quotient Vector Space: Collapsing to Zero

    Hello all I have read about quotient spaces of a vector space in several books and have an understanding of what they are. Looking up Quotient Vector Space in Wiki it says :- The quotient of a vector space V by a subspace N is a vector space obtained by "collapsing" N to zero. I...
  9. Peeter

    Reduction of a blade pseudovector quotient?

    For two blades: A \in {\bigwedge}^r B \in {\bigwedge}^{k-r} and a corresponding pseudovector for the wedge product of the two: I \in {\bigwedge}^k intuition tells me that the following scalar quotient: \frac{A \wedge B}{I} can be reduced to A \cdot...
  10. J

    Topology: homeomorphism between quotient spaces

    I posted this earlier and thought I solved it using a certain definition, which now I think is wrong, so I'm posting this again: Show that the quotient spaces R^2, R^2/D^2, R^2/I, and R^2/A are homeomorphic where D^2 is the closed ball of radius 1, centered at the origin. I is the closed...
  11. J

    TOPOLOGY: homeomorphism between quotient spaces

    Show the following spaces are homeomorphic: \mathbb{R}^2, \mathbb{R}^2/I, \mathbb{R}^2/D^2. Note: D^2 is the closed ball of radius 1 centered at the origin. I is the closed interval [0,1] in \mathbb{R}. THEOREM: It is enough to find a surjective, continuous map f:X\rightarrow Y to show that...
  12. H

    Can We Identify Quotient Groups as Subgroups of the Original Group?

    Let G be a group and let N\trianglelefteq G , M\trianglelefteq G be such that N \le M. I would like to know if, in general, we can identify G/M with a subgroup of G/N. Of course the obvious way to proceed is to look for a homomorphism from G to G/N whose kernel is M, but I can't think of...
  13. E

    Isomorphic Quotient Groups: A Counterexample

    Homework Statement Let H and K be normal subgroups of a group G. Give an example showing that we may have H isomorphic to K while G/H is not isomorphic to G/K. Homework Equations The Attempt at a Solution I don't want to look in the back of my book just yet. Can someone give me a...
  14. J

    What constitutes a quotient map?

    This is not directly a homework problem, so I opted not to place this question there. From what I have read/gathered from the internet/my textbook, a quotient mapping is any surjective, continuous mapping from a space X to a space comprised of the equivalence classes of all x in X from a...
  15. T

    Discrete Mathematics with possible Quotient Remainder Theorem

    Homework Statement For all integers m, m^{}2=5k, or m^{}2=5k+1, or m^{}2=5k+4 for some integer k. Relevant equations I'm pretty sure we have to use the Quotient Remainder THM, which is: Given any integer n and positive integer d, there exists unique integers q and r such that...
  16. C

    What is the concept of quotient space and quotient groups?

    I just wanted to know if someone can explain to me the basic concept of a quotient space and quotient groups.
  17. P

    Is Quotient Map Closed? Proof and Explanation | Math Homework

    Homework Statement THe quotient map f is open but is it also closed? The Attempt at a Solution I think it is. Consider f: X->Y FOr every open set V in Y there exists by definition an open set f^-1(V) in X. There is a one to one correspondence between open sets in X and open sets in Y by...
  18. K

    Find & Simplify Difference Quotient of f(x)=sq root x

    The question is "find and simplify the difference quotient." Given function f(x)=sq root of x So what I did is insert (x+h) under the radical & got sq root of (x+h), then I subtracted the sq root of x (original function) My answer was sq root [(x+h) - sq root (x)] / h The...
  19. RyanSchw

    Quotient Rule for Differentiating Functions | Homework Exercise 9

    Homework Statement In exercises 7-12, use the Quotient Rule to differentiate the function. 9) h(x) = \frac {\sqrt[3]{x}}{x^3+1} Homework Equations Quotient Rule The Attempt at a Solution I'm trying to figure out basic calculus over the summer in preparation for class...
  20. M

    Help with Quotient Spaces: A Guide

    Help needed to eventually understand Quotient spaces.
  21. M

    Taking the Second Derivative w/ the Quotient Rule: What if Numerator = 0?

    Just wondering how you take the second derivative when using the quotient rule. After using the quotient rule to get my first derivative, I tried again and the numerator ended up as 0.
  22. L

    What is a Quotient Set: Practical Terms & Euler's Phi Function

    what exactly is a quotient set? I know it "partitions" a large group of numbers into discrete subsets but I still don't know what exactly it is in practical terms. Like, does it relate somehow to Euler's phi function?
  23. D

    Trouble using the chain rule product rule and quotient rule

    im having a lot of trouble using the chain rule product rule and quotient rule..i can do them fine seperatly but when they're put together i can't get them like if you have (x^2-1)^4 (2-3x) i would start with 4(x^2-1)^3(2x)(2-3x)+(x^2-1)^4(-3) have i done something wrong here because i never...
  24. P

    Exploring the Notion of Quotient Rings and Groups

    Quotient ring is also know as factor ring but what has it got to do with 'division' in any remote sense whatsoever? I know it is not meant to be division per se but why give the name of this ring the quotient ring or factor ring? What is the motivation behind it? R/I={r in R| r+I} Normally...
  25. T

    Quotient map on a product space

    suppose q:M -> M/R is a quotient map. i've asked my dad what is the quotient map from MxM to (M/R)x(M/R)? he told me it is qxq: MxM -> (M/R)x(M/R) defined by (qxq)(x,y) = (q(x), q(y)), but there are some conditions to be met, but he could not remember what those conditions are. i...
  26. L

    What is Quotient? Understanding Algebraic Structures

    As one can see, the definition of quotient space, group, ring, field, vector space are very similar. It is similarly defined as an algebraic structure with a ~ on it. I am really having trouble vistualise what a quotient space and group are. My professor told me that we can work more easily with...
  27. M

    Understanding Vector Quotient Spaces in Linear Algebra

    I'm having a bit of trouble seeing Vector Quotient Spaces. Lets say I have a vector space $V$ and I want to quotient out by a linear subspace $N$. Then $V/N$ is the set of all equivalence classes $[N + v]$ where $v \in V$. For example, let me try to take $\mathbb{R}^{2} /$ x-axis. This...
  28. T

    Using the Quotient Rule with the Chain Rule

    Hi, I'm struggling to understand how to find the derivative of something like this... [(2x - 1)^2] / [(x - 2)^3] The answer in my book says it is supposed to be [-(2x - 1)(2x + 5)] / [(x - 2)^4] How do I use the chain rule with the quotient rule at the same time? I even multiplied...
  29. P

    Problem with Differentiation Using Quotient Rule

    I am attempting to find the second derivative of a function: h(x) = [(x^2)-1] / [2x-(x^2)] I proceeded by using the Quotient Rule, and I found the following as the first derivative. (It is correct.) h`(x) = [2(x^2)-2x+2] / [2x-(x^2)]^2 Next, I tried using the Quotient Rule again, and...
  30. G

    Finding units in polynomial quotient rings

    Is there a simple method for finding all the units in a polynomial quotient ring over a finite field? For example: {F_2[x] \over x^7-1} I can see the easy ones like 1, and all power of x, but I wanted a general rule or method for finding all of them if it exists (besides testing each...
  31. A

    Problems with the quotient property of logarithms

    My test here asks me to: "Use log5 2 =0.4307 and log5 3=0.6826 to approximate the value of log5 12." According to my textbook I would solve this by subtracting (using the quotient property): 0.6826-0.4307. That = 0.2519. But that number isn't right! log5 12=1.544 (about) Which I found...
  32. W

    Explaining Quotient Topology: Step-by-Step with Examples

    I can't understand it. No matter how much I try, Can anyone explain it step by step, and give some examples. How can it be applied to contruct different shapes?
  33. G

    Understanding Quotient Spaces in Topology: Exploring Attachments and Retractions

    Let X,Y be two spaces, A a closed subset of X, f:A--->Y a continuous map. We denote by X\cup_fY the quotient space of the disjoint union X\oplus{Y} by the equivalence relation ~ generated by a ~ f(a) for all a in A. This space is called teh attachment of X with Y along A via f. i) If A is a...
  34. F

    Product rule instead of quotient rule?

    Say for example, to differentiate x/(x²+1) I would use to quotient rule. However, would it be legal to bring up the denominator to: (x)(x²+1)-¹ and use the product/chain rule instead?
  35. S

    Projective plane as quotient space of a sphere

    First of all, I'm not sure if this is the right forum, but none of the forums mention topology in their description. But anyway, I'm taking a topology class, and the professor mentioned that the projective plane is obtained by identifying antipodal points on the sphere, ie, points diametrically...
  36. T

    Find the Principal Eigenvalue of Sturm-Liouville Problem with Rayleigh Quotient

    Use the Rayleight quotient to find a good approximation for the principal eigenvalue of the Sturm-Liouville problem. u'' + (\lambda - x^2)u = 0 0 < x < 0 u(0) = u'(1) = 0 Any help?
  37. M

    Simplifying an Indeterminate Quotient: Help Needed

    I need to take the limit of this quotient as n goes to infinity: [2(-1)^(n+1) - 3^(n+1)] ----------------------- [2(-1)^(n) - 3^(n)] It seems to go to infinity over infinity in its current form, which, if I recall correctly, is indeterminate. It seems then that I need to simplify...
  38. B

    How Does the Quotient Property Relate to tan 0?

    sec 0 = 1/cos 0 Write the quotient property expressing tan 0 as a quotient of two other trigonometric functions...is there someone that please lead me in the right direction? Bryce
  39. H

    Understanding Quotient Fields and Functors in Commutative Algebra

    I'm embarassed because I'm surely missing something obvious... the very first exercise in Categories for the Working Mathematician is: Show how each of the following constructions can be regarded as a functor: The field of quotients of an integral domain; the Lie algebra of a Lie group...
  40. M

    Define R/Q: How to Add in Quotient Groups

    how to define R\Q?(under addition) R\Q={a+Q:? <a<?} a€R but if it is not bounded then it will repeat please help me n
  41. M

    Limit of quotient of two functions

    Let f(x) and g(x) be functions. Then if limit of f(x)/g(x) = 1. That implies lim f(x) = lim g(x) right? Consider this proof. lim f(x)/g(x) = 1 lim f(x) x lim 1/g(x) = 1 lim f(x) = 1 / (lim 1/g(x)) lim f(x) = lim g(x).
  42. N

    Riemann sum / difference quotient

    How does the difference quotient undo what the Riemann sum does or vice versa. In terms of the two formulas? I would assume that working a difference quotient backwards would be similar to working a Riemann sum forward, but in reality as the operations go this couldn't be further from the...
  43. A

    Converting 1.262626... to a Quotient of Whole Numbers: Tricks to Solve

    i am being asked to express 1.262626... as a quotient of two whole numbers. would the answer to this be a simple 1.262626.../1000000? I know I am doing something wrong, but I am not sure what.
  44. E

    Difference Quotient and 2nd Order PDEs

    I am trying to match a result in one of my textbooks. To assist with one of their arguments they are approximating a 2nd order PDE by using a difference quotient and they show the approximation as follows: (d^2u[x,t])/(dx^2) =~ (1/h^2)(u[x+h,t]-2u[x,t]+u[x-h,t]) When I actually use...
  45. S

    Finding Elements of a Quotient Ring

    Hello all, first time to the site and its very helpful! I wish I would have found it sooner. I am stuck on quotient rings. Here is my question.. How do I find elements of a quotient ring? It asks me to list all elements of a quotient ring. Anybody have any ideas how i can find them...
  46. S

    Quotient Topology Explained: A Primer for Beginners

    Can someone explain the concept of Quotient topology. I tried to read it from a book on topology by author "James Munkres" . It was okay but I did not get a feel of what he was trying to do.. He talks about cutting and pasting elements. I kind of got lost in that.. If someone could give me a...
  47. M

    Derivative of fraction without quotient rule

    The following problem appears in my textbook (before it discusses the quotient or product rule, so those rules cannot be used for the answer): Find the derivative of the function: \frac{x^3-3x^2+4}{x^2} I brought the denominator to the top and multiplied it out to get {x-3+4x^-2}[/ltex]...
  48. S

    Exploring Quotient Spaces: Visualizing Equivalence Classes

    Hi I just wanted to know what a qoutient space is . Is there a physical picture to it? How can one imagine what an equivalence class,equivalence relation is?
  49. Simfish

    Your Empathy Quotient (and your systemizing quotient)

    http://www.guardian.co.uk/life/news/page/0,12983,937443,00.html I wonder if people here tend to have lower EQs and higher SQs than that of the general population. High SQs are almost essential for science and engineering and ones with high EQs tend to gravitate towards other fields. High SQs...
  50. Loren Booda

    Is Ignorance Essential to Discovering the Mysteries of Physics?

    It's bewildering. I earned a Masters degree in physics in 1986, long after scoring an 800 on my Math SATs in high school and studying intensive physics at Yale my freshman year. However, my "Social Quotient" seems to have had overtaken my "Physics Quotient" as I matured. I feel safer studying...
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