# Addition of Families of Intervals Question

1. Sep 19, 2009

### cmajor47

1. The problem statement, all variables and given/known data
Let A= {[-2,5],[1/2,2]} and B={[1,7],][1/4,3]}. Calculate the family A+B.

2. Relevant equations
Given F and G families of intervals, F+G is the family {I+J $$\left|$$ I$$\in$$F, J$$\in$$G}

3. The attempt at a solution
I don't understand how to calculate A+B from this equation. How do you know which intervals to add? Do I add each interval to eachother to get 4 intervals in the family? I am confused.

Last edited: Sep 20, 2009