TI-83, TI-83 Plus, TI-84 Plus Guide
tute a value for k in the differential equation before using program
EULER. It is always better
to store the exact value for a constant instead of using a rounded value.
Enter
dy
dx
= 5.9x – 3.2y in Y1. Run
program
EULER. We choose to use
10 steps over an interval of length 2;
hence, the step size is 0.2. The initial
condition is y(10) = 50.
The first estimate for a point on the
solution is y = 29.8 when x = 10.2.
Continue until 10 steps are completed;
that is, until the input is 12.
The estimate of y(12) is 21.55. Press ENTER to draw a graph
of the Euler estimates.
(Note that we cannot graph the differential equation on the
calculator we do when there is only one input variable.)
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