Which of the relations is a function?
a
{(2, 3), (3, 4), (5, 1), (2, 4)}
b
{(2, 3), ( 3, 4), (6, 2), (3, 3)}
c
{(2, 3), (3, 4), (6, 2), (7, 3)}
d
{(2, 3), (2, 4), (6, 2), (7, 3)}
a
{(2, 3), (3, 4), (5, 1), (2, 4)}
b
{(2, 3), ( 3, 4), (6, 2), (3, 3)}
c
{(2, 3), (3, 4), (6, 2), (7, 3)}
d
{(2, 3), (2, 4), (6, 2), (7, 3)}
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Answer: letter B po
Solution:
For function, any x corresponds to are y
For A: conflict between (2,3) and (2,4)
For B: meet the requirement
For C: conflict between (3,4) and (3,3)
For D: conflict between (6,1) and (6,3)