Math 111

posted by .

This is a question that deals specifically with WebWork.

Here is the question:
Write the set of points from -2 to 4 but excluding -1 and 4 as a union of intervals

my solution to this would be: [-2,4]U(-1,4)
my reasoning:
The first set includes -2 and goes up to and includes 4, the second includes everything greater than -1 and goes to everything less than 4. This way, the integer -2 is still included. BUT, this is wrong.

  • Math 111 -

    If you had all the points, you'd have [-2,4]

    But, you have to exclude 4, leaving [-2,4)

    Now, inside this interval, you exclude -1, so you have to break it up into two intervals:


  • Math 103 -

    Write the set of points from -5 to 1 but excluding -4 and 1 as a union of intervals

  • Math 111 -


Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Calculus (final question I promise)

    1. Use calculus and algebraic methods to do a complete analysis (i.e., intercepts, critical points, intervals of increase and decrease, points of inflection, intervals of concavity, local maximum or minimum points) for each of the …
  2. URGENT! Last calculus question!

    Hey! So, I was wondering if someone could answer this. I am mad studying for my exam and I still have a few questions left that I just don't have time to answer, and the assignment is due tomorrow. Thanks and here is the question: …
  3. Math

    I need help setting up this problem: Write the set of points from -7 to 1 but excluding -4 and 1 as a union of intervals.
  4. Algebra

    Question 1 Solve using the multiplication principle then graph. -15>-75 Question 2 Translate to an equality. Use the variable x. The number of people in the chess clubi less than or equal to 15. Question 3 Solve using the addition …
  5. precalculus

    Write the set of points from -7 to -1 but excluding -4 and -1 as a union of intervals
  6. chemistry

    im having trouble understanding this hw question, okay here's the question: A 0.326 8-g unknown containing Pb(CH3CHOHCO2)2 (lead lactate, FM 385.3) plus inert material was electrolyzed to produce 0.111 1 g of PbO2 (FM 239.2). Was the …
  7. Math

    What are equal intervals? I have a math question that deals with them but I don't what they are.
  8. Math

    My seven year old was set this question and I was asked to solve. Help please. Here is the question: My number has 5 tens. The ones digit is less than the tens. What could the number be?
  9. pre calc

    Write the set of points from -3 to -1 but excluding -2 and -1 as a union of intervals:
  10. intermediate algebra

    inequalities –1 ≤ x – 3 ≤ 5 –2x – 5 < –2 or x – 3 < –10 Be careful of how a negative x-term is handled in the solving process. Show all math work arriving at the solutions. •Show the solution sets written …

More Similar Questions