Let f: {a,b,c} -> {1,2,3} be a function defined by f={(a, 1), (b, 2), (c, 3)}. Which of the following is NOT true?

a. The range of f is equal to its domain.

b. f is a bijection.

c. f is one-to-one.

d. The image of f is equal to its codomain.

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- October 12th 2010, 09:46 AMilovemymathMultiple Choice Question
Let f: {a,b,c} -> {1,2,3} be a function defined by f={(a, 1), (b, 2), (c, 3)}. Which of the following is NOT true?

a. The range of f is equal to its domain.

b. f is a bijection.

c. f is one-to-one.

d. The image of f is equal to its codomain. - October 12th 2010, 09:50 AMemakarov
Hint: What is the domain of f and what is the range of f?