HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 472)

100

101

comDenom

Rewrites a sum of rational fractions as a one rational fraction. The denominator of the one rational fraction is

the common denominator of the rational fractions in the original expression. With a variable as second

argument, the numerator and denominator are developed according to it.

comDenom(Expr,[Var])

Example:

comDenom(1/x+1/y^2+1) gives (x*y^2+x+y^2)/ (x*y^2)

companion

Returns the companion matrix of a polynomial.

companion(Poly,Var)

Example:

companion(x^2+5x-7,x) returns

compare

Compares two objects and returns 1 if type(Obj1)<type(Obj2) or if type(Obj1)=type(Obj2) and Obj1<Obj2;

otherwise, it returns 0.

compare(Obj1, Obj2)

Example:

compare(1,2) gives 1

complexroot

With a polynomial and a real as its two arguments, returns a matrix. Each row of the matrix contains either a

complex root of the polynomial with its multiplicity or an interval containing such a root and its multiplicity.

The interval denes a (possibly) rectangular region in the complex plane where a complex root lies.

With two additional complex numbers as third and fourth arguments, returns a matrix as described for two

arguments, but only for those roots lying in the rectangular region dened by the diagonal created by the two

complex numbers.

complexroot(Poly, Real, [Complex1], [Complex2])

Example:

complexroot(x^3+8, 0.01) returns

This matrix indicates there is 1 complex root at x=–2, with another root between the two values in the second

row vector and a third root between the two values in the third row vector.

424 Chapter 22 Functions and commands

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