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xeze [42]
3 years ago
14

Let f(x) = -6x + 3 and g(x) = 5x + 4. Find fg and state its domain.

Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
7 0

Answer:

f(g(x))=-30x-21

The domain is all real numbers

Step-by-step explanation:

we have

f(x)=-6x+3

g(x)=5x+4

we know that

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

In the function f(x) substitute the variable x by the function g(x)

so

f(g(x))=-6(5x+4)+3

f(g(x))=-30x-24+3

f(g(x))=-30x-21

This is a linear function (equation of a line)

The domain is all real numbers

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