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Answer on Trigonometry Question for Kaci

Question #6371
Determine the domain and the range of the relation
{(2,0),(30,-5),(34,0),(2,3),(54,3)}
Expert's answer
The domain of relation r is D = {2, 30, 34, 54}
because for each element x
from D there exists at least one element y such that
(x,y) belongs to
r.
The range is R = {-5, 0, 3} because for each element y from R there exists
at least
one element x from D such that (x,y) belongs to r.

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