f(x)= 2x+22/x2+9

Question

for the following rational function, state the restrictions on variable, if any, by finding all values of the variable that are not in the domain of f. write answer with ≠.

Answer 1

Ralph, I am going to assume that 2x + 22 is your numerator and x² + 9 is your denominator.

 

The only restriction I see is that your denominator cannot equal 0. Since anything squared is positive, you can't add a positive number to it and make it equal to 0, so there are no restrictions on the variable in this case.