00:01
E to the x cosine y equal to 2x plus x cubed y, and i want to use implicit differentiation.
00:10
So i'm going to start with the left side, and i'm going to use the product rule.
00:15
So first times derivative of the second, that's a y, so that's dy dx, plus the second times times the derivative of the first, so that's just e to the x, equals 2, because that's 2 dx dx, plus, use the product rule on x cubed y, so first derivative of the second, plus second derivative of the first.
00:46
Okay, that's going to give me negative e to the x, sine y dy dx.
00:54
I'm going to bring that term that has a dy dx over from the other side and then i've got 2 plus 3x squared y minus cosine y e to the x i'm going to factor out dy dx and i've got negative e to the x minus x cubed and on the right 2 plus 3x squared y minus i'm going to rewrite that with the e to the x in the front i forgot my sign y okay now we're gonna solve for dy dx so i have 2 plus 3x x squared y minus e to the x cosine y over, this will be negative e to the x sine y minus x cubed.
02:32
Now, i want it in the form, sorry, let me copy that down so we can get the letters in the right spot.
02:42
This is a plus e to the x b plus c x squared y over d x to the e plus e to the x f.
03:04
So let me arrange things so they line up correctly.
03:09
So a is 2.
03:11
I'm going to leave that in that spot...