Asked by thomas
do you think you could explain to me which of these are not a function and why?
1.{(x,y)|y=cosx}
2.{(x,y)|x=y}
3. {(x,y)|y=3^x}
4.{(x,y)|x=3}
1.{(x,y)|y=cosx}
2.{(x,y)|x=y}
3. {(x,y)|y=3^x}
4.{(x,y)|x=3}
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