Find formulas for the functions f+g, f-g, and fg. Give the domain of each. f(x) = 7x, g(x) = x3
(f+9)(x) = 0
(Simplify your answer. Use integers or fractions for any numbers in the expression.)
(f-9)(x) =
(Simplify your answer. Use integers or fractions for any numbers in the expression.)
(f9)(x) =
(Simplify your answer. Use integers or fractions for any numbers in the expression.)
The domain for the functions f+g, f-g, and fg is
(Type your answer in interval notation.)