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Simora [160]
3 years ago
11

Let ​f(x)=x2−4 and ​g(x)=7−x. Perform the composition or operation indicated. ​(fg)(8​)

Mathematics
1 answer:
Dominik [7]3 years ago
3 0

Answer:

(f\circ g)(8)=-3

Step-by-step explanation:

<u>Composite Function</u>

Given f(x) and g(x) real functions, the composite function named (f\circ g)(x) is defined as:

(f\circ g)(x)=f(g(x))

For practical purposes, it can be found by substituting g into f.

The functions are defined as follows:

f(x)=x^2-4

g(x)=7-x

To find (f\circ g)(8), we evaluate g in x=8 and then apply the composition formula.

g(8)=7-8=-1

(f\circ g)(8)=f(g(8))

(f\circ g)(8)=f(-1)

(f\circ g)(8)=(-1)^2-4=1-4

\boxed{(f\circ g)(8)=-3}

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