Ifint(dx)/((x+2)(x^2+1))=aln(1+x^2)+btan...

`Ifint(dx)/((x+2)(x^2+1))=aln(1+x^2)+btan^(-1)x+1/5ln|x+2|+C` Then (a) `a=1/(10),b=-2/5` (b) `a=1/(10), b=-2/5` (c) `a=-1/(10),b=2/5` (d) `a=1/(10),b=2/5` ``

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