Question

B?

Answer 1

other way around, it's f/g not g/f

so f needs to be the numerator

Answer 2

C

Answer 3

you're getting there but you also need to consider what values make the denominator zero

Answer 4

D? :S

Answer 5

as a hint: if x^2 - 6 = 0 what are the possible values of x?

Answer 6

yes, D