need help functions test tomowrrow!! grade 12 advanced functions?

DarkKing

New member
ok...so i got 60 mark test tomowrrow and i really need help...is there a way to tell a graph's domain and range without graphing it just through the algebric equation??? like

y=sqrt(2x-1)

i want to save as much time on test as possible so any way at all guys and girls? thnx in advance
 
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