Im just making up a question so i can understand absolute values better. Can some1 explain pls?
what is the answer for |x|=5?
Would it be positive and negative 5? OR
x=5 if x>0, x=-5 if x<0
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jimthompson5910 (jim_thompson5910):
x = 5 if x > 0 is a bit silly to say because 5 is clearly greater than 0
so "x = 5 if x > 0" is always true
jimthompson5910 (jim_thompson5910):
you could say
|x| = 5
x = 5 or x = -5
jimthompson5910 (jim_thompson5910):
or you could say
|x| = 5
x = +-5
to shorten things up
OpenStudy (aonz):
Because there was a question that says use the definition of absolute value to write the expression without absolute value signs
jimthompson5910 (jim_thompson5910):
well the definition is
if |x| = k where k is some positive number, then x = k or x = -k
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OpenStudy (aonz):
|x+5|
and that would be
x+5 if x>0
-x - 5 if x<0
jimthompson5910 (jim_thompson5910):
you could go that route if you wanted
OpenStudy (aonz):
ok thanks i understand absolute value better now :)