Partial Derivative of y with Respect to d: Δy

[lemaire]

Homework Statement

I have an initial data of d= 0.012608, V = 320 volt, Q = 1.50e-8 and A = 1.25e-4. y = Qd/AV. what is Δy , the partial derivative of y with respect to d?

Homework Equations

The Attempt at a Solution

 

[gabbagabbahey]

When you take the partial derivative with respect to a variable, you treat all other variables as constants, so what is

\frac{\partial}{\partial d} \left( \frac{Q}{AV} d \right)

when you treat \frac{Q}{AV} as a constant?