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Let A= {1, 3, 4, 7, 11}, B = {-1, 1, 2, 5, 7, 9} and f : A → B be given by f = {(1, -1), (3,2), (4, 1), (7, 5), (11, 9)}. Then f is … (1) one-one

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Let A= {1, 3, 4, 7, 11}, B = {-1, 1, 2, 5, 7, 9} and f : A → B be given by f = {(1, -1), (3,2), (4, 1), (7, 5), (11, 9)}.

Then f is …

(1) one-one

(2) onto

(3) bijective

(4) not a function

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Answer is (1) one – one

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