Derivatives of Constant Multiples
Example:
y = 2*(x6 - 3)7
The first thing to notice when finding the derivative of this function
is that it is
the product of a constant and another function,
as shown in color below:
The Derivative Rule for Constant Multiples:
The derivative of a constant multiple is the constant times thederivative of the function.
If
then the derivative of
z is
| |
z' |
= |
( c |
f(x) )' |
| |
|
= |
c |
f '(x) |
So our example,
we can think of as
So the derivative is
| y ' |
= ( |
c |
f(x) |
)' |
| |
= |
c |
f '(x) |
|
| |
= |
2 |
((x6 - 3)7)' |
|
and we just need to know the derivative on the right-hand
side of the equation. In this case this is
| (x6 - 3)7 |
= |
7*(x6 - 3)6 (6*x5 - 0) |
(by the chain rule) |
so the finished derivative is
| y ' |
= |
2 |
( 7*(x6 - 3)6 (6*x5 - 0) ) |
| |
= |
84*x5 (x6 - 3)6 |
![[]](/images/boxby.gif)
additional explanation for the derivative of constant multiples
see another derivative of constant multiples example
practice gateway test
previous page
Page Generated: Sat May 9 03:48:51 2026
Comments to Gavin LaRose
glarose@umich.edu
©2001 Gavin LaRose,
University of Michigan Math Dept.