00:01
Okay, so we need to take derivative with respect to x, okay, then it becomes y plus 11, e to the x, y plus 11.
00:12
And then with respect to y, you will get x times e to the x, y plus 11.
00:21
And they both have to be zero, right? we know e never gets to be zero, right? you know the e graph, e to the x graph is always like this.
00:41
Okay, so then either y plus 11 is going to be zero, and x is going to be zero.
00:50
So from here, we get zero comma negative 11 as the critical number.
00:57
At this point, i think it's a good idea to look into this graph with geogebra 3d graph calculator.
01:05
You know, graphing, i would recommend doing that...