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![[Post New]](/templates/default/images/icon_minipost_new.gif) 22 Mar 2008 01:31:04 IST
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for second ques.
f(x) = log( x+  ( x2 +1 ))
f(-x) = log ( -x + (x2 +1))
adding both ,
f(x) + f(-x) = log ( - x2 +x2 +1) = log (1) =0
hence, it is an odd function...
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