HP HP-15C Advanced Functions Handbook

168 Section 4: Using Matrix Operations
• If the iteration number and value of/(x) are displayed,
repeat this step as often as necessary to obtain the
solution or go back to step 5 and revise parameters as
needed.
Example: Use the optimization program to find the dimensions of
the box of largest volume with the sum of the length and girth
(perimeter of cross section) equaling 100 centimeters.
For this problem
v = whl
v(w,h) = wh(WO -2h- 2w)
= WOwh - 2wh2 - 2hw2
Vv(w,h) —
2h(50-h-2w)
2w(50-w-2h)
The solution should satisfy w + h < 50, w > 0, and h > 0.
First, enter a subroutine to calculate the gradient and the volume.
Keystrokes
Display
120-42,21,15
121-45,23,11
122-42,23,15
123-42,16, 1
124u 4511
125- 44 .2
126- 4415
127- 4511
128- 44 .3
129-42,16, 1
130- 4415
131- 40
132- 5
133- 0
134- 30
Function subroutine.
Stores w in R 2.
Stores w in e2.
Stores h in R 3.
Stores h in k^.

HP HP-15C Specifications

General

Brand	HP
Model	HP-15C
Category	Calculator
Language	English