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



Differential Calculus

New kid on the Block

Joined: 26 Sep 2011
Post: 14
14 Jan 2012 16:31:25 IST
0 People liked this
3
255 View Post
log |x|
Mathematics

how to differentiate log |x| ..?[i mean log(modulus(x)) ]


Share this article on:

Comments (3)

Bipin Dubey's Avatar

Forum Expert
Joined: 23 Jan 2007
Posts: 7942
14 Jan 2012 18:22:23 IST
0 people liked this

x=0 is not in domain.For x>0 log|x| = logx whose differentiation is 1/xFor x<0 log|x| = log(-x) whose differentiation is again i/zso d(log|x|)/dx = 1/x
Abhishek Bandiya's Avatar

Cool goIITian

Joined: 7 Jul 2011
Posts: 59
15 Jan 2012 04:58:32 IST
0 people liked this

 differentiation   of          with  respect to  x  for  x0   is      =

 

     now   we    have  to  find      y=          

 

                      put                   |x                                                                                                                                                      then                Y =        

           y  =                                                                                                                                                                                           y=

          y=

          y=

         y=

        y=

     since  we  can  differentiate  |x| only  when  thus   y     is  not defined  when  x=0            

 

Abhishek Bandiya's Avatar

Cool goIITian

Joined: 7 Jul 2011
Posts: 59
15 Jan 2012 05:00:20 IST
0 people liked this

 differentiation   of          with  respect to  x  for  x0   is      =

 

     now   we    have  to  find      y=          

 

                      put                   |x |=t                                                                                                                                                     then                Y =        

           y  =                                                                                                                                                                                           y=

          y=

          y=

         y=

        y=

     since  we  can  differentiate  |x| only  when  thus   y     is  not defined  when  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

Name

Mobile No.

Find Posts by Topics

Physics.

Topics

Mathematics.

Chemistry.

Biology

Parents

Board

Fun Zone

Sponsored Ads