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प्रश्न
Let A = {1, 2, 3, 4} and B = {a, b, c, d}. Give a function from A → B of the following:
one-to-one and onto
उत्तर
f = {(1, a), (2, b), (3, c), (4, d)}
f is a function which is one – to – one and onto.
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