HP 15c - Manual (Page 144)

144 Section 4: Using Matrix Operations
144
Keystrokes Display
9.253 03 Volume at this iteration.
¦ 3.480 01 Gradient.
1.121 03 Slope at u
1
.
9.431 02 Slope at u
2
.
4.126 02 Slope at u
3
.
-1.139 03 Slope at u
4
(sign change).
2. j + 1.
9.259 03 Volume at this iteration.
¦ 5.479 -01 Gradient.
-6.127 -01 Slope at u
1
(sign change).
3. j + 1.
9.259 03 Volume at this iteration.
¦ 7.726 -02 Gradient less than e.
− 7.726 -02 Stops blinking.
´•4 0.0773
lA 16.6661 Recalls h form a
1
.
lA 16.6661 Recalls w form a
2
.
´U 16.6661
´>0 16.6661 Deallocates matrix memory.
The desired box size is 16.6661 Ч 16.6661 Ч 33.3355 centimeters. (An alternate method of
solving this problem would be to solve the linear system represented by

v(w, h) = 0.)