(i) d(P,Q) + d(Q,R) = d(P,R)
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Step-by-step explanation:
,<----|Q( -5 )---------|P(3)-------|R(6)------>D( P,Q ) = 3 - ( - 5 ) = 8D( P, R ) = 6 - 3 = 3D( Q , R ) = 6 - ( - 5 ) = 6 + 5 ...
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