Solve three algebra tasks (involving composite functions and inverse functions)

Math_grieg

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Nov 19, 2017
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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.
 

tkhunny

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

Find (f(g(x)) and g(f(x)).
 

stapel

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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! :oops:

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?

Please be specific. Thank you! ;)
 
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