2 years ago

What is the value of (gof)(4)?

Mathematics

2 answers:

Alinara [238K]2 years ago

7 0

I hope this helps you

ddd [48]2 years ago

6 0

(gof)(x)=g(f(x))
(gof)(4)=g(f(4))

g(f(4))
find f(4) first
f(4)=4(4)-7=16-7=9

g(f(4))=g(9)=9+3=12

(gof)(4)=12

the domain is the usable numbers
(fog)(x)
look at each
f(x)=2/x
x can be any number except 0
find what x in g(x) results in 0
0=|x|-1
add 1
1=|x|
1=x
-1=x

domain of (fog)(x) is all real numbers except for x=-1 and 1

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