### Home > A2C > Chapter 6 > Lesson 6.1.3 > Problem6-47

6-47.

Using the same function machines as in the previous problem, what is $f\left(g\left(3\right)\right)$? Be careful! The result is different from the last one because the order in which you use the machines has been switched! With $f\left(g\left(3\right)\right)$, first you find $g\left(3\right)$, then you substitute that answer into the machine named f.

$17$