190 Section 13: Finding the Roots of an Equation
Keystrokes Display
-
003- 30
*
004- 20
(x − 6)x.
8
005- 8
+
006- 40
*
007- 20
((x − 6)x + 8)x.
4 008- 4
*
009- 20
4((x − 6)x + 8)x.
7 010- 7
.
011- 48
5 012- 5
-
013- 30
| n
014- 43 32
It seems reasonable that either a tall, narrow box or a short, flat box could
be formed having the desired volume. Because the taller box is preferred,
larger initial estimates of the height are reasonable. However, heights
greater than 2 decimeters are not physically possible (because the metal
is only 4 decimeters wide). Initial estimates of 1 and 2 decimeters are
therefore appropriate.
Find the desired height:
Keystrokes Display
| ¥
Run mode.
1 v
1.0000
Initial estimates.
2
2
´ _ 3
1.5000
The desired height.
)
1.5000
Previous estimate.
)
0.0000
f (x) at root.
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