Texas Instruments TI-83 - 2.5 Operations on Functions; Composite Functions; Example 2 Evaluating a Composite Function

using the arrows to put the cursor to the left of =
1
Y and pressing ENTER
until the line style changes to 3 dots as shown:
Now set the viewing window as shown:
Press GRAPH and you should obtain the result shown in Figure 29(a) on
page 133. w
2.5 Operations on Functions; Composite Functions
EXAMPLE 2 Evaluating a Composite Function
Suppose that f x x g x x( ) ( )= − =2 3 4
2
and . Find
(a)
(
)
(
)
1gf o
Solution Let Y f x x Y g x x
1
2
2
2 3 4= = − = =( ) ( ) and as shown.
To compute
(
)
(
)
1gf o on the TI-83, we first need to insert Y
1
on the
home screen. Press the VARS button