Does the following represents function from R->R ?
f(x)=√x
In ths solution ,it is given:- f(x) is not defined for x < O.
But do we consider it by default as +/-√x or is it only +√x?
I have asked a similar ques:-http://gateoverflow.in/132553/discrete-maths-group-theory
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X->YZ , Y->XZ , ...