Exact differential equation (introduction & example)

We will see the strategy of solving an exact differential equation from the idea of the total differential (aka total derivative) of a multi-variable function from calculus 3. An exact differential equation usually has the form of M(x,y)dx+N(x,y)dy=0. And we need to check if the mixed partial derivative of M(x,y) and N(x,y) is equal in order to use this approach of solving an exact differential equation. To support my channel, you can visit the following links T-shirt: https://teespring.com/derivatives-for-you Patreon: https://www.patreon.com/blackpenredpen Thank you so much!