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id21
 3 years ago
Best ResponseYou've already chosen the best response.0If it is f(t)=sqrt(t^2+1) Then you can say that t^2+1 must be positive or 0, so it can't be negative: t^2+1<0 t^2<1 but t^2 always positive, so you can say that t can be all real number.

saifoo.khan
 3 years ago
Best ResponseYou've already chosen the best response.1brb in 10mins.. eating dinner soory!
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