Calculus worksheet chapter 4 on derivatives:

 

 

  1. Find the derivative:

 Use product rule or multiply and then take the derivative.

  1. Find the derivative:

Use the chain rule.  Let u = x+1 and y = u^3

 

  1. Find f’(x)

 

  1. You can do this derivative in 3 ways.  Take the derivative of each piece, by quotient rule or by chain rule.  Or combine this into one fraction and then use the quotient rule.

 

  1. Use the quotient rule:

 

  1. Find the derivative of

  1. Find the derivative of the following:

 

 

 

 

  1. Find the derivative:

  1. Find the derivative:

 

  1. Find the derivative:

  1. Find dy/dx given:.  Use implicit differentiation:

32x +50y dy/dx = 0

50y dy/dx = - 32 x

dy/dx = -32x/50y

dy/dx = -16x/25y

 

  1. Find the derivative of y = sin(2x).  Use the chain rule.

Let u = 2x.

du/dx = 2

y = sin u

dy/du = cos u = cos(2x)

dy/dx = dy/du * du/dx

dy/dx =2cos(2x)

 

  1. Find the derivative of

 

  1. Find the derivative of

 

  1. Find the derivative of :

Use the chain rule:

 

  1. Find the derivative of

Use the chain rule twice.  Let u = tan(5x).

du/dx = use chain rule let v = 5x

dv/dx = 5

u = tan v

du/dv = (secv)^2

du/dx = du/dv*dv/dx

 

  1. Find the derivative of .  Use the chain rule.

 

  1. Find the derivative of

Use the Chain rule:

 

 

 

 

 

 

  1. Find the derivative of:

Use two chain rules:

                                

 

1.                  A conical tank has a radius of 160 cm and a height of 800 cm.  Water is running out a small hole at the bottom.  When the height of the tank is 600 cm, what is the rate of change of its volume V with respect to the height, h?

 

First note that the ratio of the height to the radius create a similar triangles: h/r=800/160 or r = h/r.  So when the height is 600 cm, the radius is 120 cm.

 

 

2.