Hey. Im pretty confused on how to use differentation operators (dy/dx,d/dx), what does it mean in equations and how do I know when it means i should find the derivative of something. Word problems are confusing me on how to use these and when to find derivatives. I always thought differentation operators mean find the derivative. Like to find velocity, i get it by v=dx/dt of the position a function. And finding the derivative of the position function gives me the velocity function. s(position)=(t^3)-(6t^2)+9t so to find V, I: v=(ds/dt)=3t^2-12t+9 But in another example, even though i have differentation operators, i dont seem to need to find the derivative... V=5.3/P, where v is volume and p is pressure. Find the rate of change of V with respect to P when P is 50 kpa. (dv/dp)=-5.3/(p^2) =-5.3/25000=-0.00212 Sorry if i'm unclear. Basically I guess, i'm asking how to use differentation operators and when i should find the derivative when they are present in an equation.