00:01
What's super important about this problem is that this is the graph of this second derivative.
00:07
Let me just zoom in, just to double check.
00:12
And these values matter two, zero, and then over here at negative one.
00:21
And i don't know if this is defined everywhere or if we just stop at those endpoints.
00:27
But let me just assume for a second that this does go infinitely in all directions.
00:33
Because sometimes when they, it's ambiguous like this, they'll just ignore answers outside of the domain that they give you.
00:41
So the idea is this, is if the second derivative is positive, then g is concave up.
00:52
So i can say for sure that from negative 1 to 0, because it does say explain, and i might even put the implied symbol here, that we are above the x -axis.
01:06
So this is above the x -axis.
01:12
But i would actually just rather just see this.
01:17
Now, i'm going to leave some space here and write this in red in case you wanted to also say it appears like it's going to be above the x -axis from 2 to infinity.
01:27
But i wrote that in right because i don't know if you really want that.
01:30
And the same thing goes for g double prime is negative implies, that g is concave down...