1.

Let f be a continuous function satisfying f (x+y) = f (x) + f (y), for each x, y in R and f(1) = 2 then int(f(x)tan^(-1)x)/((1+x^(2))^(2))dx is equal to

Answer»

cannot be DETERMINED explicity
`C-(tan^(-1)x)/(2(1+x^(2)))+(1)/(4)tan^(-1)x+f(x)/(1+(f(x))^2)`
`C-(1)/((1+x^(2)))tan^(-1)x+(1)/(2)tan^(-1)x+(x)/(2(1X^(2)))`
`C-(1)/((1+x^(2)))tan^(-1)x+(1)/(2)tan^(-1)x+(x)/(2(1+x^(2)))`

Answer :D


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