Hp Prime Graphing Wireless Calculator Uživatelský manuál stáhnout pdf (Strana 128)

124 Functions and commands

Differential

Equation

Returns the solution to a differential equation.

deSolve(Eq,[TimeVar],Var)

Example:

desolve(y''+y=0,y) returns G_0*cos(x)+G_1*sin(x)

ODE Solve Ordinary Differential Equation solver. Solves an ordinary

differential equation given by Expr, with variables declared in

VectrVar and initial conditions for those variables declared in

VectrInit. For example, odesolve(f(t,y),[t,y],[t0,y0],t1) returns

the approximate solution of y'=f(t,y) for the variables t and y

with initial conditions t=t0 and y=y0.

odesolve(Expr,VectVar,VectInitCond,Final

Val,[tstep=Val,curve])

Example:

odesolve(sin(t*y),[t,y],[0,1],2) returns

[1.82241255674]

Linear System Given a vector of linear equations and a corresponding

vector of variables, returns the solution to the system of linear

equations.

linsolve([LinEq1, LinEq2,…], [Var1,

Var2,…])

Example:

linsolve([x+y+z=1,x-y=2,2*x-z=3],[x,y,z])

returns [3/2,-1/2,0]

Rewrite

lncollect Rewrites an expression with the logarithms collected. Applies

ln(a)+n*ln(b) = ln(a*b^n) for an integer n.

lncollect(Expr)

Example:

lncollect(ln(x)+2*ln(y)) returns ln(x*y^2)

powexpand Rewrites an expression containing a power that is a sum or

product as a product of powers. Applies

a^(b+c)=(a^b)*(a^c).

powexpand(Expr)

Example:

powexpand(2^(x+y)) yields (2^x)*(2^y)

1 2 ... 123 124 125 126 127 128 129 130 131 132 133 ... 333 334

Žádné komentáře

Hp Prime Graphing Wireless Calculator Uživatelský manuál Strana 128