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344 Functions and commands
EXTREMUM Extremum of a function. Finds the extremum (if one exists) of
the function Fn that is closest to the X-value guess.
EXTREMUM(Fn, guess)
Example:
EXTREMUM(X
2
-X-2,0) returns 0.5
ISECT Intersection of two functions. Finds the intersection (if one
exists) of the two functions Fn and Fm that is closest to the X-
value guess.
ISECT(Fn,Fm,guess)
Example:
ISECT(X,3-X,2) returns 1.5
ROOT Root of a function. Finds the root of the function Fn (if one
exists) that is closest to the X-value guess.
ROOT(Fn,guess)
Example:
ROOT(3-X
2
,2) returns 1.732…
SLOPE Slope of a function. Returns the slope of the function Fn at the
X-value (if value exists).
SLOPE(Fn,value)
Example:
SLOPE(3-X
2
,2) returns -4
Solve app functions
The Solve app has a single function that solves a given
equation or expression for one of its variables. En may be an
equation or expression, or it may be the name of one of the
Solve Symbolic variables E0–E9.
SOLVE Solve. Solves an equation for one of its variables. Solves the
equation En for the variable var, using the value of guess as
the initial value for the value of the variable var. If En is an
expression, then the value of the variable var that makes the
expression equal to zero is returned.
SOLVE(En,var,guess)