Question #e2f59
1 Answer
Feb 18, 2015
The graph is this:
graph{|x+2|-|x+1| [-10, 10, -5, 5]}
But why?
We have to "open" all the absolute values, so we have to write for which values of x the two arguments are positive or zero.
The first:
The second:
So we have three intervals:
So:
In the first interval both arguments are negative or zero and the function becomes:
In the second interval, the first is positive and the second is negative or zero and the function becomes:
In the third both arguments are positive or zero and the function becomes: