I am currently reading a book on calculus and I have come across a problem which I can't solve. I do feel like the answer is something simple. Please note that I am fairly new to calculus.

Thank you.

Started by bahozkaleez, Jan 01, 2017

8 replies to this topic

Posted 1 January 2017 - 08:07 PM

What is your definition of f'(x) ?

Are you sure the question does not say

__ If__ f(x) is differentiable at x

Consider the differentiability of f(x) = |x| and of f(x) =x^{2} at x_{o} = 0

**Edited by studiot, 1 January 2017 - 09:13 PM.**

Posted 1 January 2017 - 08:57 PM

What is your definition of f'(x) ?

Are you sure the question does not say

f(x) is differentiable at xIf_{o}then prove that.....etc ?

Consider f(x) = |x| at x

_{o}= 0

I've lost all my maths skills (except for statistics), but we always denoted the derivative function of f(x) as f'(x).

So I guess we are who we are for a lot of reasons. And maybe we'll never know most of them.

But even if we don't have the power to choose where we come from, we can still choose where we go from there.

We can still do things. And we can try to feel okay about them.

– Steven Chobsky in *The Perks of Being a Wallflower*

Posted 1 January 2017 - 09:14 PM

I've lost all my maths skills (except for statistics), but we always denoted the derivative function of f(x) as f'(x).

Yes, that's right the derived function is f'(x).

Posted 2 January 2017 - 01:22 AM

Place in the middle of the numerator. It is obvious what follows.

Posted 2 January 2017 - 06:07 AM

By defining f(x)=x^2+3x or anything else, you can put its value in the equation and get the desired results.

We are what we repeatedly do.

Excellence is then not an act but a habit.

-Aristotle

Excellence is then not an act but a habit.

-Aristotle

Posted 2 January 2017 - 06:50 AM

I am currently reading a book on calculus and I have come across a problem which I can't solve. I do feel like the answer is something simple. Please note that I am fairly new to calculus.

Thank you.

"mathematic" beat me to it

**Edited by zztop, 2 January 2017 - 06:53 AM.**

Posted 2 January 2017 - 06:59 AM

Hey zztop, you forget the limit.

;-)

We are what we repeatedly do.

Excellence is then not an act but a habit.

-Aristotle

Excellence is then not an act but a habit.

-Aristotle

Posted 3 January 2017 - 09:10 AM

"mathematic" beat me to it

Thank you, this really helped me.

**Edited by bahozkaleez, 3 January 2017 - 09:10 AM.**

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