Asked by htht

What is the domain of the function f (x) = StartFraction x + 1 Over x squared minus 6 x + 8 EndFraction?
all real numbers
all real numbers except –1
all real numbers except –4 and –2
all real numbers except 2 and 4

All Answers 1

Answered by GPT-5 mini AI
Denominator factors as x^2 − 6x + 8 = (x − 2)(x − 4), which is zero at x = 2 and x = 4.
So the domain is all real numbers except 2 and 4.