Mister Exam

Derivative of log5x+19log9x

Function f() - derivative -N order at the point
v

The graph:

from to

Piecewise:

The solution

You have entered [src]
log(5*x) + 19*log(9*x)
$$\log{\left(5 x \right)} + 19 \log{\left(9 x \right)}$$
log(5*x) + 19*log(9*x)
Detail solution
  1. Differentiate term by term:

    1. Let .

    2. The derivative of is .

    3. Then, apply the chain rule. Multiply by :

      1. The derivative of a constant times a function is the constant times the derivative of the function.

        1. Apply the power rule: goes to

        So, the result is:

      The result of the chain rule is:

    4. The derivative of a constant times a function is the constant times the derivative of the function.

      1. Let .

      2. The derivative of is .

      3. Then, apply the chain rule. Multiply by :

        1. The derivative of a constant times a function is the constant times the derivative of the function.

          1. Apply the power rule: goes to

          So, the result is:

        The result of the chain rule is:

      So, the result is:

    The result is:


The answer is:

The graph
The first derivative [src]
20
--
x 
$$\frac{20}{x}$$
The second derivative [src]
-20 
----
  2 
 x  
$$- \frac{20}{x^{2}}$$
The third derivative [src]
40
--
 3
x 
$$\frac{40}{x^{3}}$$