- #1

- 369

- 12

**ahhh guys, is d/dxf(x)=f'(x)??????**

I just don't get it, my classmates are finding the deravative of f(x), i'd think that d/dx(f(x))=f'(f(x))=some annoying long equations...

but they get d/dx(f(x))=f'(x)??? am I doing a silly mistake here?

- Thread starter Jarfi
- Start date

- #1

- 369

- 12

I just don't get it, my classmates are finding the deravative of f(x), i'd think that d/dx(f(x))=f'(f(x))=some annoying long equations...

but they get d/dx(f(x))=f'(x)??? am I doing a silly mistake here?

- #2

Mark44

Mentor

- 33,745

- 5,434

Your classmates are right. Your mistake seems to be in thinking that d/dx is the same as f'. It's not. d/dx is an operator that works on a function; f' already is a function.I just don't get it, my classmates are finding the deravative of f(x), i'd think that d/dx(f(x))=f'(f(x))=some annoying long equations...

## \frac{df(x)}{dx}## and f'(x) are essentially two different notations for the same thing.

but they get d/dx(f(x))=f'(x)??? am I doing a silly mistake here?

- #3

- 369

- 12

damn I'm stupid... well thanks a LOT. It's 1 am but who needs sleep!!!! go homework&euroshopper energy drinkYour classmates are right. Your mistake seems to be in thinking that d/dx is the same as f'. It's not. d/dx is an operator that works on a function; f' already is a function.

## \frac{df(x)}{dx}## and f'(x) are essentially two different notations for the same thing.

- Last Post

- Replies
- 1

- Views
- 7K

- Replies
- 3

- Views
- 964

- Replies
- 2

- Views
- 4K

- Last Post

- Replies
- 7

- Views
- 10K

- Last Post

- Replies
- 10

- Views
- 3K

- Replies
- 5

- Views
- 2K

- Replies
- 13

- Views
- 8K

- Last Post

- Replies
- 5

- Views
- 2K

- Replies
- 1

- Views
- 914

- Last Post

- Replies
- 3

- Views
- 2K