#(2x)/(x^(2)+1)^(2)>0#?

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Answer 1 · 2018-04-25T16:13:32

The answer #x>0#

#(2x)/(x^2+1)^2>0#

#(2x)/(x^2+1)^2>0/1#

#2x>0#

#x>0#

Answer 2 · 2018-04-25T16:20:30

It will be >0 if x>0, and viceversa

#(x^2 + 1 )^2 , always > 0 #

So, if

#x>0 .... #
Expression > 0

#x<0 .... #
Expression < 0