Question

determine the domain of the function
g(u)=sqrt(u-1)/(u^2-2) +
(u^27-u)/(u-(sqrt u+1))

Answer 1

the only restriction on the domain is when g is undefined
This occurs when the denominator is 0 so set each of the 2 bottom functions equal to 0 and solve for u
Then the domain is all real num except those values where g is undefined

Answer 2

did that make sense??

Answer 3

u^2 - 2 = 0
u - sqrt(u+1) = 0

Answer 4

let me try to work it out. it does