How do you find & draw the domain of the function
for the term 1/(x-y)^(1/7) we have all 2 space except y = x this line must be eliminated from the domain
for the term sqrt(x^2 +y^2 -121)
We must have
x^2 +y^2 -121 > 0
x^2 + y^2 > 121
this is everything on the boundary and outside the circle of radius 11
See attachment --domain in red