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Let A={1, 2, 3, 4} and B={-1 ,2, 3, 4, 5...

Let `A={1, 2, 3, 4} and B={-1 ,2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}`. Let `R={(1, 2), (2, 6), (3, 10), (4, 9)}subsetAtimesB` be a relation. Show that R is a function and find its domain, co-domain and the range of R.

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