Sunday, February 10

calculus derivative problems exam

Introduction for calculus derivative problems exam:

Two mathematicians, Namely Gottfried Leibniz and Isaac Newton, developed calculus. Calculus problems can be dividing into two branches: Differential Calculus problems and Integral Calculus problems. Differential calculus is use to measure the rate of change of a given quantity whereas the integral calculus is use to measure the quantity when the rate of change is known. The output of a function will change when we change the input value of a function. The measure of the change in the function is called as Calculus Derivatives.


Calculus derivative example problems:

The following solving problems are based on the derivatives.

Ex 1:

Determine the derivative dy/dx of the inverse of function f defined by

f(x) = (1/8) x - 2

Sol:

The first is used to find the inverse of f and differentiate it. To find the inverse of f we first write it as an equation

y = (1/8) x - 2

Solve for x.

x = 8y + 16.

Change y to x and x to y.

y = 8x + 16.

The above gives the inverse function of f. Let us find the derivative

dy / dx = 8


Ex 2:

Determine the critical number(s) of the polynomial function f given by

f(x) = x 4 - 108x + 100

Sol:

The domain of f is the set of all real numbers. The first derivative f ' is given by

f '(x) = 4 x^ 3 - 108

f '(x) is defined for all real numbers. Let us now solve f '(x) = 0

4 x^ 3 - 108 = 0

Add 108 on both sides,

4x^ 3– 108 108=108

4x^ 3= 108

x^ 3 = 27

x = 3 or x = -3

Since x = 3 and x = -3 are in the domain of f they are both critical numbers. Is this topic Limits of a Function in Calculus hard for you? Watch out for my coming posts.


Calculus derivative Practice Problems exam:



1) Determine the derivative dy/dx of the inverse of function f defined by

f(x) = x/2+ 3x/2 – 2

Answer:  dy / dx = 2


2) Determine the critical number(s) of the polynomial function f given by

f(x) = x^ 3 - 48x + 10

Answer:  X = 4 or X= -4

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