HP 39gII User Manual page 316

Common app
functions
CHECK
306
In the indeterminate case AAS where two solutions may
be possible, AAS may return a list of two such lists
containing both results.
In addition to the app functions specific to each app,
there are two functions common to the following apps:
Function
•
Solve
•
Statistics 1Var
•
Statistics 2Var
•
Parametric
•
Polar
•
Sequence
•
Checks the Symbolic view variable Symbn. Symbn can
be any of the following:
F0-F9—for the function app
•
E0-E9—for the Solve app
•
H1-H5—for the Statistics 1Var app
•
S1-S5—for the Statistics 2Var app
•
X0/Yo-X9/Y9—for the parametric app
•
R0-R9—for the Polar app
•
U0-U9—for the Sequence app
•
CHECK(Symbn)
Example:
CHECK(F1) checks the Function app Symbolic view
variable F1. The result is that F1(X) is drawn in the Plot
view and has a column of function values in the Numeric
view of the Function app.
Programming