Question

Which of the following values of X is not in the domain of f(x)=x+3/x-7

Answer 1

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Answer 2

The value of x that is not in the domain is x = 7.

which of the following values of X is not in the domain of f(x)?

Remember that in math we can't divide by zero, so any value that makes the denominator equal to zero can't be in the domain.

Here the rational function is:

f(x) = (x + 3)/(x - 7)

When x = 7, the denominator becomes zero, so x = 7 is not in the domain.