For the numbers 2 through 9 on a cellphone keypad (see figure), consider two relations: one mapping
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1 2 вс 3 DEF 4 Gн 5 кL 6 6 MNO 7 PORS 8 TUV 9WXYZ
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Mapping numbers onto letters is not a function Each number between 2 and 9 is ma...View the full answer
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