Question

If Rx= ... (photo)

Answer 1

Now, use the chain rule: \[ \frac{dR}{dt} = \frac{dR}{dx} \frac{dx}{dt} \]

Answer 2

what do you mean? how do I use that?

Answer 3

We have dx/dt. Take the derivative wrt x and multiply by it.

Answer 4

Think about these as numbers, do you agree that \[ \frac{dR}{dt} = \frac{dR}{dx} \frac{dx}{dt} \]?

Answer 5

If they are just numbers, that is.

Answer 6

350? @bmp

Answer 7

Correct :-)

Answer 8

thank you once again always so helpful! @bmp

Answer 9

No problem :-)