Natural log differentiation question

Based on your steps, it seems that you are on the right track. However, you have missed some parentheses and the exponentiation symbol in your final answer. In summary, to find f'(x) for the given function f(x) = 1/ln(10-x), you should first find the derivative of ln(10-x) which is 1/(10-x), and then apply the chain rule to get the final answer of 1/((10-x) (ln(10-x))^2).
  • #1
SYoungblood
64
1

Homework Statement


f(x) = 1/ln (10-x) -- I would assume it to be a fairly simple equation, but I am screwing it up

Homework Equations


What is f'(x)?

The Attempt at a Solution


f'(x) = (ln (10-x))^-1
= -(ln (10-x))^-2 * -1 * 1/(10-x) -- 2 negatives cancel out
= 1/(10-x) (ln(10-x))2 -- This is as far as I got and I just can tell it isn't correct.

Thank you in advance for all help.
 
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  • #2
SYoungblood said:

Homework Statement


f(x) = 1/ln (10-x) -- I would assume it to be a fairly simple equation, but I am screwing it up

Homework Equations


What is f'(x)?

The Attempt at a Solution


f'(x) = (ln (10-x))^-1
= -(ln (10-x))^-2 * -1 * 1/(10-x) -- 2 negatives cancel out
= 1/((10-x) (ln(10-x))^2) -- This is as far as I got and I just can tell it isn't correct.

Thank you in advance for all help.
Except for the above missing parentheses and exponentiation symbol, it is correct.
 
  • #3
Thank you
 

FAQ: Natural log differentiation question

What is natural log differentiation?

Natural log differentiation, also known as logarithmic differentiation, is a method used to find the derivative of a function that contains a natural logarithm. It involves using the logarithmic properties to simplify the function and make it easier to differentiate.

Why is it important to use natural log differentiation?

Natural log differentiation is important because it allows us to find the derivative of functions that cannot be easily differentiated using traditional methods. It also helps us solve complex problems in fields such as physics, economics, and engineering.

How do you use natural log differentiation?

To use natural log differentiation, follow these steps:

  1. Take the natural log of both sides of the equation.
  2. Use logarithmic properties to simplify the function.
  3. Take the derivative of both sides of the equation.
  4. Solve for the derivative of the original function.

What are some common mistakes when using natural log differentiation?

Some common mistakes when using natural log differentiation include forgetting to use the chain rule, incorrectly applying logarithmic properties, and not simplifying the function enough before taking the derivative.

Can natural log differentiation be used for any function?

Yes, natural log differentiation can be used for any function that contains a natural logarithm. However, it may not always be the most efficient or necessary method for finding the derivative.

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