Question 254669
The question was
{{{g(x)=9/(10-9x)}}}
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To find domain, we ask two questions:
(1) is the variable in a square root?
If yes, the set that stuff >=0.
If no, then question 2
(2) is the variable in the denominator?
If yes set the denominator not = 0 and solve
If no, then say "all reals".
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Our variable is in denominator so
10-9x not = 0
-9x not = -10
x not = 10/9.
The domain is all reals except 10/9.