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Suppose there are two functions \( f \) and \( g \), whose values are defined by the table below. Calculate \( g\left(f^{-1}(1)\right) \).

\begin{tabular}{|l|l|l|l|l|l|l|}
\hline
[tex]$x$[/tex] & 1 & 2 & 3 & 4 & [tex]$K$[/tex] & [tex]$Q$[/tex] \\
\hline
[tex]$f(x)$[/tex] & 12 & 3 & 1 & 2 & 4 & 7 \\
\hline
[tex]$g(x)$[/tex] & 11 & 2 & 4 & 1 & 8 & 7 \\
\hline
\end{tabular}

Sagot :

To find \( g(f^{-1}(1)) \), we need to follow these steps:

1. Find \( f^{-1}(1) \):
Determine the value of \( x \) for which \( f(x) = 1 \).

Looking at the table for \( f(x) \):
[tex]\[ \begin{array}{|l|l|l|l|l|l|l|l|} \hline x & 1 & 2 & 3 & 4 & K & Q \\ \hline f(x) & 12 & 3 & 1 & 2 & 4 & 7 \\ \hline \end{array} \][/tex]
We see that \( f(3) = 1 \), hence \( f^{-1}(1) = 3 \).

2. Calculate \( g(f^{-1}(1)) \):
Now that we have \( f^{-1}(1) = 3 \), we need to find \( g(3) \).

Looking at the table for \( g(x) \):
[tex]\[ \begin{array}{|l|l|l|l|l|l|l|l|} \hline x & 1 & 2 & 3 & 4 & K & Q \\ \hline g(x) & 11 & 2 & 4 & 1 & 8 & 7 \\ \hline \end{array} \][/tex]
We find that \( g(3) = 4 \).

Therefore, the value of \( g(f^{-1}(1)) \) is \( 4 \).

[tex]\[ \boxed{4} \][/tex]