How do you explain the term 'exact differential equation'? - Answers

An exact differential equation is a type of first-order differential equation that can be expressed in the form ( M(x, y) , dx + N(x, y) , dy = 0 ), where ( M ) and ( N ) are continuously differentiable functions. An equation is considered exact if the partial derivative of ( M ) with respect to ( y ) equals the partial derivative of ( N ) with respect to ( x ), i.e., ( \frac{\partial M}{\partial y} = \frac{\partial N}{\partial x} ). This condition indicates that there exists a function ( \psi(x, y) ) such that ( d\psi = M , dx + N , dy ). Solving an exact differential equation involves finding this function ( \psi ).