Question

What is the domain of f(x)= 7- (x-3)^1/2?

Answer 1

x-3>=0 domain is [3,+infinty[

Answer 2

are you working in a complex system?

Answer 3

I don't know it just say to tell the domain if f(x) is to be a real number

Answer 4

if f(x) to be real, the square root of (x-3) must be >=0, so your domain is x>=3

Answer 5

Since you have 7 - sqrt(x-3), then you have a domain of all real numbers, because 7 - sqrt(0) is 7. This is assuming that you have learned that sqrt(0) = 0. Provided you are not working with complex number (a.k.a. i = sqrt(-1)).
Hope this helps.
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