Find f o g and g o f

f(x) = x² + 1,g(x) = 

x

all real numbers x such that x ≥ −1

all real numbers x such that x ≥ 0 

all real numbers x except x = 1

all real numbers x

Domain of
g:

all real numbers x such that x ≥ −1 all real numbers x such that x ≥ 0  all real numbers x except x = 1 all real numbers x

Domain of
f

g:

all real numbers x such that x ≥ −1 all real numbers x such that x ≥ 0  all real numbers x except x = 1 all real numbers x

Domain of
g

f:

all real numbers x such that x ≥ −1 all real numbers x such that x ≥ 0  all real numbers x except x = 1 all real numbers x