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write the domain of the function in interval notation: 1.) f(x)=7x/x+9 2.) f(x)=4x^2/x^2+11x

write the domain of the function in interval notation:

1.) f(x)=7x/x+9

2.) f(x)=4x^2/x^2+11x

Math   Prealgebra   
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