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pishuonlain [190]
3 years ago
5

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

Mathematics
2 answers:
Alinara [238K]3 years ago
7 0
I hope this helps you

ddd [48]3 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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