f(x)=2x+1 and fog(x)=3x-1 find g(x)
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Answer:
f(x)=2
10
x+1
g(x)=3
10
x−1
f(g(x))=x
f(3
10
x−1)=2
10
(3
10
⋅x−1)+1=x
6
10
x−2
10
+1=x
⇒x(6
10
−1)=2
10
−1
⇒x=
6
10
−1
2
10
−1
⇒x=
3
10
−2
−10
1−2
−10
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