To find f(g(x)) first put g(x) inside and get f(x-1)... now use the action os f(x)

a) Then h(x) = sqrt(x-1). OK!

b) The domain of h(x) is all real number x so that x >= 1... because the function sqrt(x)

require x > = 0.

c) h(2) = sqrt(2-1) =1 ,... h(0) cannot be find because 0 is out of the domain. OK!

√(x-1)

x≥1

√2-1 = √1 = 1

√0-1 = √-1 --> not in domain