EL-9600/9400 Graphing Calculator
Step & Key OperationDisplayNotes
(When using EL-9600)(When using EL-9600)
*Use either pen touch or cursor to operate.
2-2Use the cursor to check the positionPoints in the solution region
of each point. (Zoom in as necessary).are (2.8, -1.4) and (-8, 4).
Points outside the solution
GRAPH or or or
region are (-1.6, 1.8) and
(-2, -5).
.
2-3Substitute points and confirm(-1.6, 1.8): -1.6 + 2 5 1.8 = 2
whether they are in the solution Ţ This does not materialize.
.(-2, -5): -2 + 2 5 (-5) = -12
region.
2
(-2) + (-5) = -1
(-) 16 Y Ţ This does not materialize.+
.(2.8, -1.4): 2.8 + 2 5 (-1.4) = 0
2 X 1 Y ...8(2.8)2 + (-1.4) = 6.44
Å¢ This materializes.
(Continuing key operations omitted.)
.(-8, 4): -8 + 2 5 4 = 0
2
(-8)+ 4 = 68
Å¢ This materializes.
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Graphical solution methods not only offer instructive visualization of the solution process,
but they can be applied to inequalities that are often very difficult to solve algebraically.
The EL-9600/9400 allows the solution region to be indicated visually using the Shading
feature. Also, the free-moving tracer or Zoom-in feature will allow the details to be
checked visually.
7-4
HB1.DocC.998.10.1, 11:40 AM |
ACEC
