math

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Suppose A is the set of students registered at the University of Calgary, and C is the set of courses currently being offered at the University of Calgary. Under what conditions is each of the following a function?
a)
{(a, c) | a’s first class each week is in c}
b)
{(a, c) | a has a class in c Saturday evening}

• math -

What do you think?

• math -

not sure confused

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