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to find integration of (1+(1/x*x))/(x*x+(1/(x*x))+3)
Dear student in denominator x^2 + 1/x^2 – 2 + 5 = ( x – 1/x)^2 +( sqrt5)^2 now coming to the Question put x – 1/x = t(1 + 1/x^2 ) dx = dt dt/ t^2 + (sqrt5)^2 = 1/ sqrt(5) tan^-1 (t/sqrt5) now put t = x – 1/x
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