HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 428)

100

101

Polynomial

Find Roots

Given a polynomial in x (or a vector containing the coeicients of a polynomial), returns a vector containing its

roots.

proot(Poly) or proot(Vector)

Example:

proot([1,0,-2]) returns [-1.41421356237,1.41421356237]

Coeicients

Given a polynomial in x, returns a vector containing the coeicients. If the polynomial is in a variable other

than x, then declare the variable as the second argument. With an integer as the optional third argument,

returns the coeicient of the polynomial whose degree matches the integer.

coeff(Poly, [Var], [Integer])

Example:

coeff(x^2-2) returns [1 0 -2]

coeff(y^2-2, y, 1) returns 0

Divisors

Given a polynomial, returns a vector containing the divisors of the polynomial.

divis(Poly) or divis({Poly1, Poly2,…})

Example:

divis(x^2-1) returns [1 -1+x 1+x (-1+x)*(1+x)]

Factor List

Returns a vector containing the prime factors of a polynomial or a list of polynomials, with each factor

followed by its multiplicity.

factors(Poly) or factors({Poly1, Poly2,…})

Example:

factors(x^4-1) returns [x-1 1 x+1 1 x

+1 1]

GCD

Returns the greatest common divisor of two or more polynomials.

gcd(Poly1,Poly2...)

Example:

gcd(x^4-1, x^2-1) returns x^2-1

LCM

Returns the least common multiple of two or more polynomials.

380 Chapter 22 Functions and commands

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