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Sav [38]
3 years ago
11

Given the functions,f(x)= 3x - 2 and g(x) =

Mathematics
1 answer:
Fofino [41]3 years ago
3 0

Answer:

1) f(g(x))=x

g(f(x))=x

2) f(x) and g(x) are inverses of each other.

Step-by-step explanation:

The given functions are :

f(x) = 3x - 2

and

g(x) =  \frac{x + 2}{3}

1) We want to find:

f(g(x)) \: and \: g(f(x))

This implies that:

f(g(x)) = f( \frac{x + 2}{3})

We substitute into f(x) to get:

f(g(x)) =  3( \frac{x + 2}{3}) - 2 \\f(g(x)) =  x + 2- 2 \\ f(g(x)) =  x

Also,

g(f(x)) =  g(3x - 2) \\ g(f(x)) =   \frac{3x - 2  + 2}{3}  \\ g(f(x)) =  \frac{3x}{3}   \\ g(f(x)) = x

2) Since the composition of the two functions:

f(g(x)) = g(f(x)) = x

f(x) and g(x) are inverses of each other.

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