Tuesday, September 27th

This is what we are going to do today:

INTERVALS
We learned about intervals last week. Here there are some exercises:
- Go to the bottom of this page and click on "new problem". Try it at least 5 times.

Union and intersection of intervals

The union of two sets A and B, denoted AUB is the set that consists of all elements that are in A or in B (or in both A and B).

The intersection of two sets A and B, denoted A∩B is the set that consists of all elements that are in A and in B (the common elements to both sets).

Here it´s an example of the union and intersection of intervals. Study it and then solve the exercises:

- Go to this page, write your answers to questions 1 to 6 in your notebook and check them on the webpage.

- In the following exercises, click on the right answer: question 7, question 8, question 9, question 10.

- Work out the union and intersection of the following pairs of intervals:
a) A=(2,5), B=[3,7]
b) A=(-2,3], B=(3,4)
c) A=(-∞,0], B=[0,5)

RADICALS
Read the first lines from this Wikipedia page. Now you must know what a radical or surd is. Try some easy activities.