Question

f(x)=4x-7/x-8
a.(0) b. f(2) c. f(-2) d. f(a+b)
e. why must 8 be excluded from domain of f.

Answer 1

a) substitute 0 for x in the equation and calculate f(x)
(whenever you see x, you can replace x with 0 and solve for f(x)

b) substitute 2 for x in the equation and calculate f(x)
c) substitute -2 for x in the equation and calculate f(x)
d) substitute (a+b) for x in the equation and calculate f(x)
e) x = 8 makes the denominator equal to 0

Answer 2

take the time to read the response

Answer 3

f(x)=13/x-6
what is the domain of f

Answer 4

The domain is all the values that x can have.
Do you mean

\(y = \dfrac{13}{x - 6} \) ?

Answer 5

@candyhuebner
Come back and answer my question above.