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Mathematics, 11.01.2021 21:10 lily3934

Which relation is not a function? 1) {(1,5),(2,6),(3,6),(4,7)}
2) {(4,7),(2,1),(-3,6),(3,4)}
3) {(-1,6),(1,3), (2,5),(1,7)}
4) {(-1,2),(0,5),(5,0),(2,-1)}

1 ?
2 ?
3 ?
4 ?

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Which relation is not a function? 1) {(1,5),(2,6),(3,6),(4,7)}
2) {(4,7),(2,1),(-3,6),(3,4)}<...
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