# Thread: Solve three algebra tasks (involving composite functions and inverse functions)

1. ## Solve three algebra tasks (involving composite functions and inverse functions)

Given f(x) = 4x + 13, g(x) = -2x + 23. Find (f º g)(x).

Determine wether f(x) = 3x + 8 and g(x) = x - 8 / 3 are inverse functions.

For f(x) = 3x - 19, find the inverse f-¹(x). Minus sign is supposed to be uppercase..

Many thanks!!

Best,
E.G.

2. Why not use that composite idea to prove whether things are inverses?

Find (f(g(x)) and g(f(x)).

3. Originally Posted by Math_grieg
1. Given f(x) = 4x + 13, g(x) = -2x + 23. Find (f º g)(x).

2. Determine whether f(x) = 3x + 8 and g(x) = x - 8 / 3 are inverse functions.

3. For f(x) = 3x - 19, find the inverse f(x).

Many thanks!!
Um... you're welcome, but for what? You haven't asked a question yet!

Are you asking for lesson instruction, so you can learn what these questions mean? Are you halfway through one or another of these, and are needing help getting un-stuck? Or are you having some other difficulty?