HP Prime Graphing NW280AAABA Symb2polyExpr,Var Symb2polyExpr, Var1, Var2,…, Poly2symbVector, Var

Create

Poly to Coef Given a polynomial, returns a vector containing the coefficients of the polynomial. With a variable as second argument, returns the coefficients of a polynomial with respect to the variable. With a list of variables as the second argument, returns the internal format of the polynomial.

symb2poly(Expr,[Var])

or

symb2poly(Expr, {Var1, Var2,…})

Example:

symb2poly(x*3+2.1) returns [3 2.1]

Coef to Poly With one vector as argument, returns a polynomial in x with coefficients (in decreasing order) obtained from the argument vector. With a variable as second argument, returns a similar polynomial in that variable.

poly2symb(Vector, [Var]))

Example:

poly2symb([1,2,3],x) returns (x+2)*x+3

Roots to Coef Returns a vector containing the coefficients (in decreasing order) of the univariate polynomial whose roots are specified in the argument vector.

pcoef(Vect)

Example:

pcoeff([1,0,0,0,1]) returns [1,-2,1,0,0,0]

Roots to Poly Takes as argument a vector. The vector contains each root or pole of a rational function. Each root or pole is followed by its order, with poles having negative order. Returns the rational function in x that has the roots and poles (with their orders) specified in the argument vector.

fcoeff(Vector) where Vector has the form [Root1, Oder1, Root2, Order2, …])

Example:

fcoeff([1,2,0,1,3,-1]) returns (x-1)^2*x*(x-3)^- 1

Functions and commands 341