Annoying question

[MBBS]

Exercise 1 G. Esstials Maths Methods 3/4 CAS

Question 2 b.

If someone could do this would be greatly appreciated.

Attached is the question.

[TrueTears]

let y = g(x)

y = 1/(9-x)

inverse: x = 1/(9-y)

1/x = 9-y

y = 9-1/x

dom of inverse = range of original

ran of inverse = domain of original

cbf with details but thats the principle.

[MBBS]

Solved it, >.< stupid stupid stupid error.

[MBBS]

Thanks TT,

I was getting the range of the original function to be (0, infinity), I didn't see the - in front making it (- infinity, 0 )

I  must be getting tired...