Answer:
15.
Step-by-step explanation:
The given functions are
[tex]f(x)=3x[/tex]
[tex]f[g(1)]=f[(1)+4][/tex]
[tex]h(x)=x^2-1[/tex]
We need to find the value of f[g(1)].
[tex]f[g(1)]=f[(1)+4][/tex] [tex][\because f[g(1)]=f[(1)+4]][/tex]
[tex]f[g(1)]=f[5][/tex]
[tex]f[g(1)]=3(5)[/tex] [tex][\because f(x)=3x][/tex]
[tex]f[g(1)]=15[/tex]
Therefore, the value of f[g(1)] is 15.
