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[" (c) (c) transitive only "],[" Let "A=...

[" (c) (c) transitive only "],[" Let "A={2,3,4,5,...,17,18}." Let "prime simeq" be the equivalence relation on "A times A," cartesian product "],[" of "A" with itself,defined by "(a,b)~=(c,d)" iff "ad=bc." Then,the number of ordered pairs of the "],[" equivalence class of "(3,2)" is "]

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