HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 498)

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power_regression

Given a set of points dened by two lists, returns a vector containing the coeicients m and b of y=b*x^m, the

monomial which best approximates the given points.

power_regression(List1, List2)

Example:

power_regression({1, 2, 3, 4}, {1, 4, 9, 16}) returns [2 1]

powerpc

Given a circle and a point, returns the real number d2–r2, where d is the distance between the point and the

center of the circle, and r is the radius of the circle.

powerpc(Circle, Point)

Example:

powerpc(circle(0,1+i),3+i) gives 8

prepend

Adds an element to the beginning of a list or vector.

prepend(List, Element) or prepend(Vector, Element)

Example:

prepend([1,2],3) gives [3,1,2]

primpart

Returns a polynomial divided by the greatest common divisor of its coeicients.

primpart(Poly,[Var])

Example:

primpart(2x^2+10x+6) gives x^2+5*x+3

product

With an expression as the rst argument, returns the product of solutions when the variable in the expression

goes from a minimum value to a maximum value by a given step. If no step is provided, it is taken as 1.

With a list as the rst argument, returns the product of the values in the list.

With a matrix as the rst argument, returns the element-byelement product of the matrix.

product(Expr, Var, Min, Max, Step) or product(List) or product(Matrix)

Example:

product(n,n,1,10,2) gives 945

propfrac

Returns a fraction or rational fraction A/B simplied to Q+r/ B, where R<B or the degree of R is less than the

degree of B.

450 Chapter 22 Functions and commands

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