APFIVE Separation Of Variables
Which of the following is an example of separating variables in a differential equation?
A
Representing the derivative as $$y=\frac{4*x}{dy/dx}$$
B
Rewriting $$\frac{dy}{dx}=\frac{4*x}{y}$$ as $$y\,dy = 4*x\,dx$$
C
Writing $$dy = 4*x\,dx$$ without accounting for y
D
Expressing $$\frac{dy}{dx}=4*x+y$$ in separated form