find domain and function f(x)=rootx-3 Share with your friends Share 1 Vijay Kumar Gupta answered this Consider the following function. fx=x-3Note that the square root is defined for only postive values.In case of negative values, it gives imaginary values.So the above function is defined if the expression under the root signis greater than or equal to zero.That is, x-3≥0or x≥3So the domain of the function is [ 3,∞ )The minimum value of the function is f3=3-3=0So the range of the given function is [ 0,∞ ) 1 View Full Answer