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ANSWER IN TEXT FORM QUESTION 4 Let f:A-B and g:B-C be functions. (a) Prove that if f and g are injective, then gof is injective.

ANSWER IN TEXT FORM

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QUESTION 4 Let f:A-B and g:B-C be functions. (a) Prove that if f and g are injective, then gof is injective. (b) Prove that if f and g are surjective, then gof is surjective

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