B b521 New member Joined Jul 20, 2010 Messages 4 Jul 20, 2010 #1 If y = x³ + 2x and dx/dt = 5, find dy/dt when x = 2. I'm not really sure how to solve this problem at all. It's the first I've seen like this so I don't know what approach I should take.
If y = x³ + 2x and dx/dt = 5, find dy/dt when x = 2. I'm not really sure how to solve this problem at all. It's the first I've seen like this so I don't know what approach I should take.
D Deleted member 4993 Guest Jul 20, 2010 #2 b521 said: If y = x³ + 2x and dx/dt = 5, find dy/dt when x = 2. I'm not really sure how to solve this problem at all. It's the first I've seen like this so I don't know what approach I should take. Click to expand... Use chain rule of differentiation \(\displaystyle \frac{dy}{dt} \ \ = \ \ \frac{dy}{dx}\cdot \frac{dx}{dt}\)
b521 said: If y = x³ + 2x and dx/dt = 5, find dy/dt when x = 2. I'm not really sure how to solve this problem at all. It's the first I've seen like this so I don't know what approach I should take. Click to expand... Use chain rule of differentiation \(\displaystyle \frac{dy}{dt} \ \ = \ \ \frac{dy}{dx}\cdot \frac{dx}{dt}\)
