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If $\int \large\frac{dx}{x^2+2x+2}$$=f(x) +c,$ then f(x) is equal

\[\begin {array} {1 1} (a)\;\tan^{-1}(x+1) & \quad (b)\;2 \tan^{-1} (x+1) \\ (c)\;-\tan^{-1} (x+1) & \quad (d)\;3 \tan^{-1} (x+1) \end {array}\]

1 Answer

$(a)\;\tan^{-1}(x+1)$
answered Nov 7, 2013 by pady_1
 
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