1.

int(3x^2)/(x^2+1)dx

Answer»

SOLUTION :`INT(3x^2)/(x^2+1)DX`
=`3int((x^2+1)-1)/(x^2-1)dx`
=`3int{1-1/(x^2+1)}dx`
=`3{x-tna^-1x}+C`


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