1. math

    Give a counterexample to show that the following generalization about the set of integers is false. Closure property for division.

    asked by m on October 19, 2010
  2. math

    Give a counterexample to show that each of the following generalizations about the set of integers {-3,-2,-1,0,1,2,3} is false. a) commutative property for subtraction b)associative property for subtraction

    asked by m on October 20, 2010
  3. math

    Give a counterexample to show that each of the following generalizations about the set of integers {-3,-2,-1,0,1,2,3} is false. a) closure property for division b) distributive property for division over addition.

    asked by m on October 20, 2010
  4. math

    1)Find the third iterate x3 of f(x)=x2-4 for an initial value of x0=2 A)-4 B)4 C)12 D)-12 I chose C 2)Use Pascal's triangle to expand:(w-x)5 This ones long so I chose w5-5w4x+10w3x3-10w2x4+5wx4-x5 3)Use the binomial Theorem to find the third term in the

    asked by Jon on December 13, 2007
  5. Geometry

    CounterExamples and Inductive Reasoning and Conjectures? Make a Conjecture for Each Scenario. Show your Work - the sum of the first 100 positive even numbers, - the sum of an even and odd number. - the product of two odd numbers. FInd One CounterExample to

    asked by Geometry Help!!!! on September 16, 2011
  6. Algebra

    True or false? Negative numbers are closed under addition. Give a counterexample True or false? Prime numbers are closed under subtraction. Give a counterexample True or false? Natural numbers are closed under division. Give a counterexample

    asked by Katherine on August 15, 2016
  7. geometry

    Determine whether the conjecture is true or false. If false, give a counterexample. Given: ∠A is supplementary to ∠B and ∠B is supplementary to ∠C. Conjecture: ∠A is supplementary to ∠C. Select one: a. False; they could be right angles. b.

    asked by homework on June 15, 2018
  8. 11th grade mths

    Please check urgently .I have to submit the assignment A give an example of a function whose domain equals the set of real numbers and whose range equals the set? the set {-1,0,1} BGive an example of a function whose domain equals (0,1)and whose range

    asked by Fatima on September 18, 2012
  9. Maths(please check urgently

    Please check urgently .I have to submit the assignment A give an example of a function whose domain equals the set of real numbers and whose range equals the set? the set {-1,0,1} BGive an example of a function whose domain equals (0,1)and whose range

    asked by Fatima on September 18, 2012
  10. Algebra II

    In an induction proof of the statement 4+7+10+...+(3n-1)=n(3n+5)/2 the first step is to show that the statement is true for some integers n. Note:3(1)+1=1[3(1)+5]/2 is true. Select the steps required to complete the proof. A)Show that the statement is true

    asked by Jon on December 15, 2007
  11. math

    If m=n,then m−n = n−m = 0. Give a counterexample to show that the conditional is false

    asked by Anonymous on March 23, 2015
  12. math

    If true, prove. If false, provide just a counterexample: a. For every function f from nonnegative integers into nonnegative reals, o( f ) = O( f ) −Θ( f ) . (Here, “-“ denotes the set difference: A – B consists of elements in A that are not in

    asked by huing on March 29, 2014
  13. Maths

    A give an example of a function whose domain equals the set of real numbers and whose range equals the set? the set {-1,0,1} BGive an example of a function whose domain equals (0,1)and whose range equals [0,1] C.Give n example of a function whose is the

    asked by fatima on September 17, 2012
  14. Math/ Algebra

    Give an example of a function using a set of at least 4 ordered pairs. The domain will be any four integers between 0 and +10. The range will be any four integers between -12 and 5. Explain why your example models a function. Give an example of at least

    asked by Dawn on March 8, 2012
  15. math

    Part 1 In your own words, define the word “function.” Give your own example of a function using a set of at least 4 ordered pairs. The domain will be any four integers between 0 and +10. The range will be any four integers between -12 and 5.Explain why

    asked by king on December 1, 2011
  16. Math

    Hello, Can someone help me with my math problem? Does |k – n| = |k| – |n| for all integers k and n? If so, give 3 examples.If not, give a counterexample.

    asked by hannah on February 25, 2010
  17. Algebra

    show all work for counterexample.for all integers a, b, and c----if a=b, then a/c=b/c

    asked by Nicole on June 3, 2009
  18. Math

    Can someone please explain this to me: Does |n+m|=|n| + |m| for all integers n and m? If so, give some examples. If not, give a counterexample.

    asked by B.B. on June 30, 2009
  19. Math

    1. Write the converse of the following true conditional statement. if the converse is false, write a counterexample. If a < 10, then a < 15 a) if a > 10, the a > 15; false. Counterexample: a=12 and a

    asked by Tim on October 13, 2015
  20. math 213

    Tell whether each of the following is true for all sets A, B If false, give a counterexample. A

    asked by susan on August 18, 2012
  21. math

    Tell whether each of the following is true for all sets A, B, or C. If false, give a counterexample.? a. A-B=A- ∅ b. (A ¾B) ̅=(A ) ̅¾B ̅ c. A ¿(B¾C)=(A¿B)¾C d. (A-B)¿A=A e. A-(B¿C)=(A-B)¿(A-C)

    asked by abby on June 15, 2013
  22. Math

    Determine whether each equation is true for all x for which both sides of the equation are defined. If it is true, support your conclusion with a sketch using the unit circle. If it is false, give a counterexample. inverse sin(-x)=-inverse sin(x) inverse

    asked by Anonymous on May 25, 2009
  23. math

    Tell whether each of the following is true for all sets A, B, or C. If false, give a counterexample. c. A¿(BUC) = (A¿B) UC d. (A-B)¿A=A e. A-(B¿C) = (A-B) ¿ (A-C)

    asked by susan on August 18, 2012
  24. Math

    suppose you had a very small set of numbers that contained only 0 and 1 would this set be closed under addition? if not give a counterexample. please help me

    asked by penelope on September 25, 2015
  25. math

    Algebra For questions 1-5, find the value of the variable. 1. x = (1 point) 2. y = (1 point) 3. x = (1 point) 4. x = (1 point) 5. (1 point) x = , y = , b = 90 x = , y = 3, b = 95 x = , y = 2, b = 90 x = , y = , b = 130 In Exercises 6-8, decide whether the

    asked by Sasha Z. on May 20, 2010
  26. alegebra

    Find a counterexample to show the statement is false. the whole number s are closed under division.

    asked by zully on September 17, 2010
  27. alegebra

    Find a counterexample to show the statement is false. the whole number s are closed under division.

    asked by zully on September 17, 2010
  28. Geometry

    Find one counterexample to show that each conjecture is false. The sum of two numbers is greater than either number.

    asked by Catelin on August 8, 2011
  29. geometry

    find one counterexample to show that each conjecture is false : 1. the sum of two numbers is greater than either number ? help please!!!

    asked by kayla on August 18, 2010
  30. geometry

    I really need help on this question: Determine whether each conjecture is true or false.Give a counterexample for any false conjecture. Given:Wx=XY Conjecture:W,X,Y are collinear. PlEASE HELP!!!

    asked by Rick on September 13, 2012
  31. Algebra

    True or False. The fifth root of a positive integer is sometimes irrational. Please give an example or a counterexample so that I can understand it fully.

    asked by Paula on July 26, 2013
  32. Geometry

    Find one counterexample to show that each conjecture is false. The product of two positive numbers is greater than either number.

    asked by Catelin on August 8, 2011
  33. math

    The following conjectures were made by students. Which do you think are false? Give a counterexample for each conjecture if possible. a. Only half of the nonzero even numbers up to 100 are divisible by 4.

    asked by chandice on June 21, 2009
  34. geometry

    "Determine whether the conjecture is true or false.Give a counterexample for any false conjecture". Given: x = 5 Conjecture: m = 5 PLEASE HELP!!!

    asked by Ian on September 19, 2012
  35. Math

    determine whether each conjecture is true or false. Give a counterexample for any false conjecture Given: Points A and B are collinear. Conjecture: Points A and B form a line.

    asked by Cee on December 20, 2010
  36. math

    Please check. (4xy^2)(3x^-4y^5) = 12x^-3y^7 (2x)^5 (3x)^2 = 288x^7 (-3x^2)^4 = 81x^8 True or False: the set of integers is a subset of the set of natural numbers. False All numbers are real numbers. True

    asked by anonymous on August 21, 2008
  37. 11th grade maths

    A.give an example of a function whose domain is {3,4,7,9}? and whose range is {-1,0,3} B.Find two different functions whose domain is {3,8}and whose range is {-4,1} C Explain why there does not exist a function whose domain is {-1,0,3} and whose range is

    asked by fatima on September 17, 2012
  38. math

    (4xy^2)(3x^-4y^5) = 12x^-3y^7 (2x)^5 (3x)^2 = 288x^7 (-3x^2)^4 = 81x^8 True or False: the set of integers is a subset of the set of natural numbers. False All numbers are real numbers. True

    asked by anonymous on August 22, 2008
  39. math

    Give your own example of a function using a set of at least 4 ordered pairs. The DOMAIN will be any four integers between 0 and +10. The RANGE will be any four integers between -12 and 5

    asked by tim on September 11, 2010
  40. math

    Give your own example of a function using a set of at least 4 ordered pairs. The DOMAIN will be any four integers between 0 and +10. The RANGE will be any four integers between -12 and 5.

    asked by sm on November 16, 2009
  41. Math

    Find a counterexample to show that the conjecture is false. Any number that is divisible by 5 is also divisible by 3. A. 45 B. 60 C. 30 D. 25

    asked by China on April 12, 2012
  42. algebra

    give a counter example to show that each statement is false, the domain of each variable is the set of real numbers..... number 1 said 1. if a2=b2, then a=b idk how yo do it??

    asked by josh on October 21, 2009
  43. math

    Does absolute value n+m= absolute value n + absolute value m for all integers n and m? If so give examples if not give a counterexample.

    asked by m on October 18, 2010
  44. Discrete Structures

    a. Show that in any set of n integers, there is a subset whose sum is divisible by n. b. Show that for any integer n, there is an integer whos digits (in decimal representation) consist of only 0 and 1. I don't think the first can be proved. However, in a

    asked by Lolita Sams on July 2, 2005
  45. geometry

    All Clemson fans root for the Tigers. Rewrite the above statement to reflect the following conditions and state whether each condition is true or false. If false provide a counterexample:

    asked by mirry on September 27, 2018
  46. Discrete Mathematics

    Write the inverse, converse, and contrapositive of the following statement: upside down A x E R, if (x + 2)(x - 3) > 0, then x < -2 or x >3 Indicate which among the statement, its converse, ints inverse, and its contrapositive are true and which are false.

    asked by Joy on July 26, 2013
  47. geometry

    1) Make a conjecture about the next item in the sequence. 2, -20, 200, -2000, ? 2)Determine whether the following conjecture is true or false. Give a counterexample if the answer is false. __ __ AB ⊥ BC, then ∠ABC is a right angle 3)Make a conjecture

    asked by roj on June 22, 2018
  48. SAT math

    Set M consists of the consecutive integers from -15 to y, inclusive. If the sum of all the integers in set M is 70, How many numbers are in the set? SAT prep help - Anonymous, Saturday, September 28, 2013 at 3:16pm a. 33 b. 34 c. 35 d. 36 e. 37

    asked by Anonymous on September 28, 2013
  49. math: real numbers

    Determine whether the following statement is true or fase. If true, provide a proof; if false, provide a counterexample. If S is a bounded set of real numbers, and S contains sup(S) and inf(S), then S is a closed interval.

    asked by sara on April 10, 2007
  50. Math

    If a set of closed under addition, must it also be closed under multiplication? explain your answer or give a counterexample

    asked by Kelley on October 17, 2017
  51. Math

    The average of a set of five different positive integers is 360. The two smallest integers in the set are 99 and 102. What is the largest possible integer in this set?

    asked by Mark on January 29, 2010
  52. Math

    Determine whether, for any set A, it is true that P(A) = P(U) − P(A). If it is true prove it, if it is not, give a counterexample.

    asked by Anonymous on April 22, 2015
  53. Calculus

    If a_n >0 and b_n >0 and series ∑ sqrt( (a_n)^2 +(b_n)^2 ) converges, then ∑a_n and ∑b_n both converge. True or false? If true, why? If false, give a counterexample.

    asked by Rebecca on October 20, 2011
  54. Geometry plz help

    1.Which choice shows a true conditional with a correctly identified hypothesis and conclusion? •If next month is January, then this month is the last of the year. Hypothesis: This month is the last of the year. Conclusion: Next month is January.

    asked by GummyBears18 on September 21, 2016
  55. Geometry

    1.Which choice shows a true conditional with a correctly identified hypothesis and conclusion? •If next month is January, then this month is the last of the year. Hypothesis: This month is the last of the year. Conclusion: Next month is January.

    asked by GummyBears18 on September 21, 2016
  56. math

    7. Classify each of the following as true or false. If false, tell why or give an example showing that it is not true. (a) For all sets A and B, A – B = B – A (b) For all sets A,   A (c) For all sets A, A  A   (d) The set {r, s, t,. . .,

    asked by poo on December 1, 2009
  57. Geomerty

    Find a Counterexample to show that the conjecture is false. Conjecture: Any number that is divisible by 6 is also divisible by 12. A. 36 B. 30 C. 48 D. 60 Im thinking that the answer is B. 30, but i was just making sure.

    asked by Court on April 12, 2010
  58. math

    provide a counterexample to show that each statement is false. a) if a four sided figure has four congruent sides, then it has for right angles. at first i thought of a trapezoid proves that wrong but then i remembered only 2 sides have to be congruent for

    asked by Maryanne on September 1, 2010
  59. math

    A set of integers has a sum of 420, and an average of 60. If one of the integers in the set is 120, what is average of the remaining integers in the set?

    asked by ja on January 30, 2013
  60. SAT prep help

    Set M consists of the consecutive integers from -15 to y, inclusive. If the sum of all the integers in set M is 70, How many numbers are in the set?

    asked by Anonymous on September 28, 2013
  61. Math

    1. Set I contains six consecutive integers. Set J contains all integers that result from adding 3 to each of the integers in set I and also contains all integers that result from subtracting 3 from each of the integers in set I. How man more integers are

    asked by Irene on September 12, 2016
  62. math

    True or false 1.) The set of integers contains the set of rational numbers 2.)Every repeating decimal is a rational number 3.)Every square root is an irrational number 4.) the set of whole numbers contains the set of rational number 5.)every terminating

    asked by xavier on October 30, 2017
  63. Math 8th Grade

    Which number serves as a counterexample to the statement below: All positive integers are divisible by 2 or 3 I need as much as possible.

    asked by Lana Von Monroe on April 11, 2012
  64. Geometry

    Make a conjecture for each scenario The square root of an even number The product of two odd numbers and a multiple of 2 Find one counterexample to show that each conjecture is false. For two real numbers a and b, a is either equal to b or greater than b.

    asked by Nautica on October 18, 2018
  65. algebra

    True or false if the statement is not true give a counterexample. 1.If a>b,and c is positive, then ac>bc? 2.if a^2=b^2,then a=b? 3. If a>b,and c is positive,then a/c>b/c?

    asked by Hannah on September 12, 2014
  66. Math

    The least integer of a set of consecutive integers is -48. if the sum of these integers is 49, how many integers are in the set?

    asked by Amy on August 22, 2011
  67. Math

    The least integer of a set of consecutive integers is -25 if the sum of these integers is 26,how many integers are in this set?

    asked by Kayla on March 28, 2012
  68. calculus

    Determine whether the statement is true or false. If it is true, explain why it is true. If it is false, give an example to show why it is false. a- if f is a function of x and y and a is a real number, then f(ax, ay)= af(x,y). b- if fx(a,b) < 0, then f is

    asked by help please. on March 11, 2012
  69. geometry

    In geometry, can a counterexample be used to determine if a conjecture is false or not?

    asked by erin on January 15, 2010
  70. MATH

    find a counterexample to prove the following is false: x is less than or equal to 2x

    asked by alice on February 11, 2013
  71. Math

    Which statements is false? A. A decimal fraction has a multiple of 10 as a denominator. B. Every rational number can be associated with a point in the real number line. C. A terminating decimal cannot be expressed as a repeating decimal. D. The set of

    asked by Kimberly on July 8, 2015
  72. Math

    write the converse and contrapositive for the conditional statement below. decide whether each of the three statements is true or false. provide a counterexample for any false statement. If n is a prime number, then n+1 is an even number

    asked by bobby on December 17, 2010
  73. Math

    write the converse and contrapositive for the conditional statement below. decide whether each of the three statements is true or false. provide a counterexample for any false statement. If n is a prime number, then n+1 is an even number

    asked by bobby on December 18, 2010
  74. Math

    Lisa looked at a group of even numbers. The numbers were 4, 8, 48, and 64. She made a generalization that all even numbers can be divided by 4. Which number below could you use to show weather Lisa's generalization is correct or incorrect. A. 18 B. 28 C.

    asked by CanYouHelpMe on March 7, 2017
  75. Math

    1. What is the distance between the points (1, 4) and (4, 8)? I said Distance = 5 2. Find the slope between (1, 4) and (4, 8) I said 4/3 3. Are the expressions (4x+4)/4 and x+1 equivalent? I said Yes 4. Simplify (x+y)2 x2 + 2xy + y2 5. Is (x – y )2 = x2

    asked by Carly on February 12, 2016
  76. Maths

    A polynomial g(x) is given by: g(x) = (x-1)(x+2)(x-a)(x-b) 1) Given that g(0)=4 show that ab=-2 2) given also that g(3)=40 show that a+b=1 3) given that a and b are integers, give possible values for a and b. Thank you

    asked by Anonymous on October 14, 2015
  77. Algebra I

    Tell whether the set is closed under the operation. If it is not closed give an example that shows that the set is not closed under the operation. 10. Positive irrational numbers; division 11. Negative rational numbers; multiplication 12. Negative

    asked by Anonymous on October 26, 2017
  78. math

    The statement is If a number is divisible by 2 and by 3, then it is divisible by 6 and vice versa. Is this statement true? Give an example or counterexample. I believe it is true but am stuck on the counterexample/example.

    asked by m on October 8, 2010
  79. Multiple Choice HELP!

    What is a counterexample for the conjecture? Conjecture: The product of two positive numbers is greater than the sum of the two numbers. A. 3 and 5 B. 2 and 2 C. A counterexample exists, but it is not shown above. D. There is no counterexample. The

    asked by ALEXA on March 20, 2014
  80. college math

    I do not understand a problem from a text book or how to solve the problem for the answer. Could shomeone show me the steps (show work) on how to solve this question. The sum of the intergers from 1 through n is n(n+1)/2. the sum of the squares of the

    asked by dave on August 13, 2010
  81. Algebra

    1. Choose the correct solution in roster form. N is the set of natural numbers that are factors of 12. {1, 2, 3, 4, 6} {1, 2, 3, 4, 6, 12} {1, 2, 3, 4, 5, 6, 8, 12} *this is my answer {1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12} 2. Write the solution to the

    asked by Robin Kwan on December 12, 2016
  82. math

    Give your own example of a function using a set of at least 4 ordered pairs. The DOMAIN will be any four integers between 0 and +10. The RANGE will be any four integers between -12 and 5. Your example should NOT be the same as those of other students or

    asked by Nisha on January 8, 2010
  83. Writeacher

    To earn the appreciation of honest critics and endure the betrayal of false friends; To follow the way your honest critics want you to trail and change their outlook about you. To suffer the pain your false friends give you from within, but don’t let it

    asked by Angelina on November 9, 2010
  84. math 213

    Tell whether each of the following is true for all sets A, B If false, give a counterexample. a. A-B= A-0 (with slashed O) b. AUB (with line over AUB) = AUB (with line over A and a line over B)

    asked by susan on August 18, 2012
  85. algebra 1

    is the set of all positive integers closed under addition? if yes..give 2 examples if no,,,give 2 examples that prove it is not

    asked by maria on September 9, 2017
  86. MATH combinatorics HELP!!!!!

    Determine the least positive integer n for which the following condition holds: No matter how the elements of the set of the first n positive integers, i.e. {1,2,…n}, are colored in red or blue, there are (not necessarily distinct) integers x,y,z, and w

    asked by Bob K. on May 11, 2013
  87. Geometry

    1. A conditional can have a ____ of true or false. (1 point) a) hypothesis b) truth value *** c) counterexample d) conclusion Am I right? Thank you!

    asked by ρσяк on January 26, 2018
  88. math

    Write the set of integers that satisfy the sentence: I had 10 question for this,anybody can show this one how to do it. 4 > n > 0

    asked by thomas on August 9, 2014
  89. math

    is the set of positive integers the same as the set of nonegative integers? explain please

    asked by Taylor on October 18, 2012
  90. math

    is the set of positive integers the same as the set of nonnegative integers? Explain

    asked by Taylor on October 21, 2012
  91. math

    the average of 4 concecutive even integers is 17. find the integers samantha, jason, mary-beth, john, tyrik, aaron, katie, and tiffany -- You would probably get better responses if you show what YOU have done so far to try to solve these problems. Our job

    asked by tiffany on November 29, 2006
  92. quad. eq.

    find 3 consecutive integers such that the product of the second and third integer is 20 Take three integers x, y, and z. The for xyz, we want y*z = 20 The factors of 20 are 20*1 10*2 5*4. 20*1 are not consecutive. 10*2 are not consecutive. But 5 and 4 are

    asked by chrisw on February 1, 2007
  93. maths

    explain why are the following not groups: 1)the set of Z integers with operation subtraction 2)The set of Z integers with operation addition 3)The set of R* of all non zero real numbers with addition

    asked by JENNY on October 25, 2012
  94. math

    The following conjectures were made by students. Are they true or false? Give a counterexample if possible. Only half of the nonzero even numbers up to 100 are divisible by 4. My answer is that it is true. A number is divisible by 8 if it is divisible by 4

    asked by m on October 10, 2010
  95. english

    i have to make a poster using the following words: main idea, theme, generalization. i have to give the defintion and give examples. any suggestion how to do it. thanks

    asked by joe on September 6, 2009
  96. calculus

    determine whether the statement is true or false. If it is true, explain why it is true. If it is false, give an example to show why it is false a) the function f(x)=3/2 +cx^-2 is a solution of the differential equation xy'+2y=3 b) the differential

    asked by jhony on April 10, 2012
  97. Math

    I am stuck on trying to figure out how to do this question. Could someone please show me 5 necessary steps ? Thank you. Here is how the assignment question is worded. Select any two integers between -12 and +12 which will become solutions to a system of

    asked by Tiffany on February 10, 2011
  98. algebra 2

    Show by counterexample that (x+y)^-2 and x^-2+y^-2 are not equivalent??

    asked by Janet on October 28, 2014
  99. geometry!!! please help me!!!!

    Determine the least positive integer n for which the following condition holds: No matter how the elements of the set of the first n positive integers, i.e. {1,2,…n}, are colored in red or blue, there are (not necessarily distinct) integers x,y,z, and w

    asked by sanji on May 8, 2013
  100. math

    Using these integers:-1,+6,-8,+3,-2 a) Which integers have the greatest product? Show your work. b) Which two integers have the least product? Show your work. Please help I don't understand how to figure this out thank you

    asked by Cherie on October 3, 2012