Home » Ask & Discuss » Mathematics. » Differential Calculus « Back to Discussion

Differential Calculus

New kid on the Block

Joined:	16 Sep 2007
Post:	10

17 Sep 2007 16:23:07 IST

0 People liked this

635

Interesting ques. on differentiation rates assured

None

If f(x)= (x-a)(x-b)(x-c)..............................................(x-z)
then find the value of
f'(x)=?

Share this article on:

Comments (8)

Dipanjan Saha

Hot goIITian

Joined: 25 Aug 2007

Posts: 177

17 Sep 2007 16:25:23 IST

Like 0 people liked this

take log on both sides and differentiate. That shud do.

Ambareesh Rishi

Blazing goIITian

Joined: 4 May 2007

Posts: 499

17 Sep 2007 16:33:55 IST

Like 2 people liked this

answer is very easy
it is 0
am i right yeah i am suer it is right

dont forget to rate me

ajit pandey

New kid on the Block

Joined: 16 Sep 2007

Posts: 10

17 Sep 2007 17:05:39 IST

Like 0 people liked this

can u give the detail?

Nadeem

Blazing goIITian

Joined: 25 Aug 2007

Posts: 521

17 Sep 2007 18:46:48 IST

Like 1 people liked this

f(x)=(x-a) (x-b)......(x-x)...(x-z)
    =(x-a) (x-b)......0...(x-z)
    =0

since 0 is a constant f `(x)=0

Ambareesh Rishi

Blazing goIITian

Joined: 4 May 2007

Posts: 499

17 Sep 2007 20:26:10 IST

Like 0 people liked this

i think rates were assured..

Krishna Gopal Singh

Forum Expert

Joined: 29 Dec 2006

Posts: 5153

19 Sep 2007 23:41:05 IST

Like 0 people liked this

Good answer ambreesh, but poor question ajitres. This is more like playing tricks then a genuin differentiation question

Gaurav |spideyunlimited| Ragtah

Moderator

Joined: 16 Dec 2006

Posts: 3373

20 Sep 2007 16:24:21 IST

Like 2 people liked this

there will be on term with (x-x) so the whole thing will become 0.
and diff. of a constant is 0.

Tanmay

Blazing goIITian

Joined: 6 Sep 2007

Posts: 956

21 Sep 2007 23:17:44 IST

Like 0 people liked this

ans is zero as (x-x)=0
f(x)=0
f'(x)=0

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team

Free Sign Up!

Preparing for IIT-JEE ?

Arihant Revision Package for IIT JEE - Books, Practice Tests + Rank Predictor

@ INR 1,995/-

For Quick Info

Find Posts by Topics

Physics.

Topics

9395

20091

3672

2186

7617

2827

2637

Mathematics.

Chemistry.

Biology

Institutes

Parents

Board

Fun Zone