Question

What do I do when I have to find derivative but I am given dx / dx (v/u) instead of (u/v) ?

Answer 1

see pic of problem

Answer 2

I know d(v/u) = u'v - v' u / (v^2)

Answer 3

rename the variables in your rule:
d(v/u) = u'v - v' u / (v^2) to

d(u/v) = v' u - u' v/(u^2)

Answer 4

now use the "new" rule

Answer 5

ah okay. thanks!