Question
Function
Find the first partial derivative with respect to m
Find the first partial derivative with respect to v
∂m∂D=v1
Simplify
D=vm
Find the first partial derivative by treating the variable v as a constant and differentiating with respect to m
∂m∂D=∂m∂(vm)
Use differentiation rule ∂x∂(g(x)f(x))=(g(x))2∂x∂(f(x))×g(x)−f(x)×∂x∂(g(x))
∂m∂D=v2∂m∂(m)v−m×∂m∂(v)
Use ∂x∂xn=nxn−1 to find derivative
∂m∂D=v21×v−m×∂m∂(v)
Use ∂x∂(c)=0 to find derivative
∂m∂D=v21×v−m×0
Any expression multiplied by 1 remains the same
∂m∂D=v2v−m×0
Any expression multiplied by 0 equals 0
∂m∂D=v2v−0
Removing 0 doesn't change the value,so remove it from the expression
∂m∂D=v2v
Solution
More Steps

Evaluate
v2v
Use the product rule aman=an−m to simplify the expression
v2−11
Reduce the fraction
v1
∂m∂D=v1
Show Solution

Solve the equation
Solve for m
Solve for v
m=Dv
Evaluate
D=vm
Swap the sides of the equation
vm=D
Cross multiply
m=vD
Solution
m=Dv
Show Solution
