3< the absolute value of x+4 which is less than <9
C Cgotchag New member Joined Sep 26, 2007 Messages 1 Sep 26, 2007 #1 3< the absolute value of x+4 which is less than <9
tkhunny Moderator Staff member Joined Apr 12, 2005 Messages 11,339 Sep 26, 2007 #2 Cgotchag said: 3< the absolute value of x+4 which is less than <9 Click to expand... 3 < | x+4 | < 9 Just ponder the behavior of those absolute values. Either of these will do: 3 < ( x+4 ) < 9 for x > -4 3 < -( x+4 ) < 9 for x < -4 You tell me where I got that -4 and why it is so important.
Cgotchag said: 3< the absolute value of x+4 which is less than <9 Click to expand... 3 < | x+4 | < 9 Just ponder the behavior of those absolute values. Either of these will do: 3 < ( x+4 ) < 9 for x > -4 3 < -( x+4 ) < 9 for x < -4 You tell me where I got that -4 and why it is so important.
