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Mathematics, 26.09.2019 08:30 DeathFightervx

Which of the following expressions represents a function?
a. x2 y2 = 9
b. {(4, 2), (4, –2), (9, 3), (9, –3)}
c. x = 4
d. 2x y = 5

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Which of the following expressions represents a function?
a. x2 y2 = 9
b. {(4, 2), (4,...
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