00:01
First of all, f is a continuous function for entire real numbers.
00:10
And if you can see, the value of the function at negative 1 is 2.
00:16
The value of the function at 0 is negative 3.
00:21
The value of the function is 1 at 1 and 2 at 2 and at 3 it is negative 5.
00:32
So let's draw a rough sketch of this function.
00:39
So we have minus 1 here, and 0 here, 1 here, 2 here, 3 here.
00:46
At minus 1 it is positive 2.
00:48
So i'll put a point here.
00:51
At 0 it is negative 3, i'll put a point here.
00:55
And at 1 it is 1 again here, so it is somewhere here.
00:58
At 2 again it is 2 here.
01:00
At at 3 it is again negative 5, somewhere around here...