If a and −a are numbers on the number line, which
expression MUST give the distance between them?
A) 0
B) a
C) |2a|
D) |a|
Answers
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(C) option will give you correct distance between both the points.
Why???? Read further
Since, 0 will be in mid distance between 0 and a=a and distance between 0 and -a =a
therefore distance will be 2a but it will be always positive so modulus is their.
Why???? Read further
Since, 0 will be in mid distance between 0 and a=a and distance between 0 and -a =a
therefore distance will be 2a but it will be always positive so modulus is their.
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