HP Prime Graphing Calculator - Manual (Page 392)

388 Functions and commands
fMax Returns the value of the abscissa at the maximum value of an
expression. Without a second argument, it is assumed that it
the abscissa is x. With a variable as second argument, it is
taken as the abscissa.
fMax(Expr,[Var])
Example:
fMax(-x^2+2*x+1,x)
gives
1
fMin Returns the value of the abscissa at the minimum value of an
expression. Without a second argument, it is assumed that it
the abscissa is x. With a variable as second argument, it is
taken as the abscissa.
fMin(Expr,[Var])
Example:
fMin(x^2-2*x+1,x)
gives
1
FOR Used in programming in loops for which the number of
iterations is known.
format Returns a real number as a string with the indicated format
(f=float, s=scientific, e=engineering).
format(Real,Str("f4"||"s5"||"e6"))
Example:
format(9.3456,"s3")
gives
9.35
fracmod For a given integer n (representing a fraction) and an integer
p (the modulus), returns the fraction a/b such that n=a/b(mod
p).
fracmod(Intg(n),Intg(p))
Example:
fracmod(41,121)
gives
2/3
froot Returns the list of roots and poles of a rational polynomial.
Each root or pole is followed by its multiplicity.
froot(RatPoly)
Example:
froot((x^5-2*x^4+x^3)/(x-3))
gives
[0,3,1,2,3,-
1]