Choose all that are injective (1-1), (write in ascending order: 1, 2 ...etc) ...
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Choose all that are injective (1-1), (write in ascending order: 1, 2 ...etc)
- f(x) = 7x + 2 , R → R
- f(x) = x3 - 4x , R → R
- f(x) = x + 1 , N → N
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