Question #4a77e

1 Answer
Eduardo A.
Oct 25, 2017

(-#oo#,#oo#)

Explanation:

If the question is #|x|# #>=# 0 you have that #x# # <=# 0 or 0#<=# #x#. But every number verifies that. In fact if #x# is a negative number #x<0# and if it's positive #x>0#, finally if it's #0# then #x=0#. Then #x # must be in #(-oo,oo)# which is #x in RR#

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