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Grade 12Integral Calculus

Sir How to solve this
And how to approach these type of question

Question image for Sir How to solve this And how to approach these t
Profile image of Jamil Ahamed
7 Years agoGrade 12
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1 Answer

Profile image of Aditya Gupta
7 Years ago
so simply put 1+1/x=y^2
so we have 2y*dy/dx= -1/x^2= – (y^2 – 1)^2
so integral becomes
 –y*2ydy/(y^2 – 1)^2
now write the denominator as (y – 1)^2*(y+1)^2
now use partial fractions and write the entire function of y as 
A/(y – 1)+B/(y – 1)^2+C/(y+1)+D/(y+1)^2
after that the integral is trivial and simply replace y as root(1+1/x) to obtain the final answer.