HP 48gII User Manual
Page 568
Page 17-15
of the complicated nature of function Y(X), it will take some time before the
graph is produced. Be patient.)
There are two roots of this function found by using function
@ROOT within the
plot environment. Because of the integral in the equation, the root is
approximated and will not be shown in the plot screen. You will only get the
message Constant? Shown in the screen. However, if you press
` at this
point, the approximate root will be listed in the display. Two roots are shown
in the right-hand figure below.
Alternatively, you can use function
@TRACE @(X,Y)@ to estimate the roots by
tracing the curve near its intercepts with the x-axis. Two estimates are shown
below:
These estimates suggest solutions x = -1.9 and x = 3.3. You can verify these
“solutions” by evaluating function Y1(X) for X = -1.9 and X = 3.3, i.e.,