I think you should figure out topics you are weak in and than start revising them again ..

Also you should go through what has been taught in your coaching classes along with some new problems everyday .....

 

Please try to understand that you should be clear with theoritical portions before you start attempting various problems from various sources.

 

Once you are done with what i have suggested then you start solving test papers .. this generally gives a lot of confidence .. it gave me when i did my preparation ...

 

I hope my reply helps u ......... cheers

hii

First of all never lose hope ...... no one around is extraordinary ..

 

The phase you are going through is a very common one .. I went through it when i was preparing ... I remember it clearly that when I was in std 12th , I did faced problems like this ...

But then I did not lost hope and kept working hard ... n results spoke for themselves ... so just one advice .. keep working ..

 

God shall help u in suceeding

 

cheers

Open the series of cosx e^x and e^-x by power series method .....

 

Now use two concepts .. these are to be used in general while solving such questions

 

First the limit has to exist so the constant and coefficeint with x have to be zero since we have xsinx in the denominator ...

 

Second the coefficent of x² term should give the limit .....

 

I hope this helps .. reply back to this post if things are not clear ..

 

cheers !!!

Let the two parts be x and y ..

 

So we have two equations

 

                       x + y = 30000

 

   and            0.09x + 0.11y = 3060

 

  Now write these equations as a matrix and we are done !!!

 

  cheers

Well yes this is correct !!

If u want to find the range then this is also fine ... all depends on what the question demands !!

The books which represent sgn(x) as mod(x)/x have defined it wrong. The actual definition is as follows :

 

                    sgn(x) =  mod(x)/x   when x  0

                            

                              =  0              when x = 0

 

Now the thing should be hopefully clear ......

 

Cheers

 

 

It is okay dear ... the syllabus for iit do not chnage much .... or let me put it this way that even if it changes the books remain the same ... a new edition of M.L. khanna wud just have a new cover and nothing more than that .. so u can use the book u have purchased and there is no need to worry about ...

 

cheers

 

Gr8 answer ... rahul gr8 work done ..

cheers

 

hiiii

All the above suggested solutions are valid ..

See the key point is that u try to understand the concepts .. use some book say Arihant's book and start going through the theory of one chapter, once u know the theory then start solving problems ... going from easy to hard level .

 

While u solve problems focus on the concepts rather than the craming of way to solve the problems ... gradually u will start understanding the topics .. n u will not face any problem ..

 

Keep confidence in urself ... cheerooo

 

Correct answer .... well done !!!

 

 

The answer is C since we do not know that the force is applied in which direction and what is the direction of the displacement.

 

Note that the work done if F.d !!!!

 

cheers