Q. For α in R let ⌊α⌋ denotes greatest integer less than or equal to α. Solution : Given function d:R×R→[0, ∞] defined as d(x,y)=⌊|x-y|⌋ For the option (1) Suppose d(x,y)=0=> ⌊|x-y|⌋=0=>0≤|x-y|<1 ⇏x=y For example x =0, y =0.5 then…
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