Browse Questions

# Let A = {–1, 2, 2, – 4} and $B = \bigg\{ -\large\frac{1}{4}$$, -1, \large\frac{1}{2}$$, 1, 2 \bigg\}$  Is f = {(– 1, – 1), (2, 1), (– 4, 2)} a function from ‘A’ to ‘B’? If so, find its domain, range and co-domain.

Domain of ‘f’ = the set of first members of the ordered pairs in ‘f’ = {–1, 2, –4}, Range of f = the set of second members of the ordered pairs in ‘f’ = {–1, 1, 2} Co-domain of ‘f’ = set ‘B’ $= \bigg\{ -\large\frac{1}{4}$$, -1, \large\frac{1}{2}$$, 1, 2 \bigg\}$