Question

If d(xy) + d(yw) = d(xw) then​

Answer 1

Step-by-step explanation:

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A metric space is a set X together with such a metric. The prototype: The set of real numbers R with the metric d(x, y) = |x - y|. This is what is called the usual metric on R.

Answer 2

$d(xy) + d(yw) = d(xw) \\ \\ d(x w) = d(xw)$