Hp Prime Graphing Wireless Calculator Manual do Utilizador descarregar pdf (Página 204)

200 Functions and commands

potential Returns a function whose gradient is the vector field defined

by a vector and a vector of variables.

potential(Vector1, Vector2)

Example:

potential([2*x*y+3,x^2-4*z,-4*y],[x,y,z])

returns x

*y+3*x-4*y*z

power_regression Given a set of points defined by two lists, returns a vector

containing the coefficients 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 d

–r

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 coefficients.

primpart(Poly,[Var])

Example:

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

product With an expression as the first 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 first argument, returns the product of the

values in the list.

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