Skip to main content

Partial fraction Shortcut Methods and Trick (आंशिक भिन्न )



In this article we are going to discuss about solving approach of partial fraction questions.
Partial fraction is widely used in integration problems in 12th level mathematics also in various competitive examinations.

General method

(px+q)/(xa)(xb).=A/(xa).+B/(xb)

For example:
Ques-:          2x + 3                                        
                   (x+1)(x-3)
Solution:  

                             2x+3         ------------(1)
                        (x+1)(x-3)
Seperating the equation
                 2x+3     =     A     +    B             -------(2)
               (x+1)(x-3)      (x+1)    (x-3)


               2x+3=A(x-3)+B(x+1)............(3)
*for.     (x+1)=0.   We have    x=-1
            On substituting 2+3=A(-1-3)
             1=-4A ,    A= -1/4
* Again if (x-3)=0 then x=3 again substituting
      2(3)+3=B(3+1)
      9=4B, B =9/4
A and B value equation (2)partial fraction is 
        -1       +      9     
     4(x+1)      4(x-3)  

Shortcut Method:
Ques-:          2x + 3                                        
                   (x+1)(x-3)


                          2x+3         ------------(1)
                        (x+1)(x-3)
Seperating the equation

                 2x+3     =     A     +    B             -------(2)
               (x+1)(x-3)      (x+1)    (x-3)




Substituting the obtained values.
    -1       +      9     
     4(x+1)      4(x-3)  

This way we can easily solve any partial fraction question in short time

If you have any doubt relating this article or topic you can comment and ask in specific.

Comments

Popular posts from this blog

Child development & pedagogy questions with answer.

In teaching recruitment pedagogy is compulsory paper that accompanies. So here we are compiling collection of some important mostly asked question previously in kv , nvs and other exams previously. Candidates must practice these question because they are repeated many times in different examination. In the end of article we have also mentioned useful books you can buy in english and हिंदी  medium। Best Books at discounted rate:   बाल विकास एवं शिक्षा शास्त्र Child pedagogy solved questions                                   1.The word pedagogy means. A To guide the child B. To lead the child C. To educate the child D. To understand the child Answer: B 2. Pedagogy is the study of: A. Education B. Guiding Students C. Learning Process D. Teaching Methods Answer: D 3. Which one of the followings indicates child’s physical growth? A. Negat...