Question

~PLEASE HELP OFFERING 15 POINTS~

Answer 1

Correct answer is D).
A) and C) are polynomials, so x∈R, in B) we have √x, and in this case x ≥ 0.

Answer 2

Answer:

$f(x)=\frac{1}{x-3}$

Step-by-step explanation:

find function that consist of domain = all real numbers greater than 3

A) $f(x) = 3x$

f(x) is a linear function, for all linear function the domain is set of all real numbers.

B)  $f(x)= \sqrt{x}$

For square root function , the domain is set of all real numbers greater than 0

C) $f(x) = 3x + 4$

 f(x) is a linear function, for all linear function the domain is set of all real numbers.

D)  $f(x)=\frac{1}{x-3}$

for square root function we set x-3>0 and solve for x

x > 3, so domain is all real numbers greater than 3