HP Prime Graphing NW280AAABA manual Solve

Inverse Laplace Returns the inverse Laplace transform of an expression.

invlaplace(Expr,[Var],[IlapVar])

Example:

ilaplace(1/(x^2+1)^2) returns ((-x)*cos(x))/ 2+sin(x)/2

FFT With one argument (a vector), returns the discrete Fourier transform in R.

fft(Vect)

With two additional integer arguments a and p, returns the discrete Fourier transform in the field Z/pZ, with a as primitive nth root of 1 (n=size(vector)).

fft((Vector, a, p)

Example:

fft([1,2,3,4,0,0,0,0]) gives [10.0,- 0.414213562373-7.24264068712*(i),- 2.0+2.0*i,2.41421356237-1.24264068712*i,- 2.0,2.41421356237+1.24264068712*i,-2.0-2.0*i]

Inverse FFT Returns the inverse discrete Fourier transform.

ifft(Vector)

Example:

ifft([100.0,-52.2842712475+6*i,- 8.0*i,4.28427124746- 6*i,4.0,4.28427124746+6*i,8*i,-52.2842712475- 6*i]) gives [0.99999999999,3.99999999999,10.0,20.0,25.0,2 4.0,16.0,-6.39843733552e-12]

Solve

Solve Returns a list of the solutions (real and complex) to a polynomial equation or a set of polynomial equations.

solve(Eq,[Var]) or solve({Eq1, Eq2,…}, [Var])

Examples:

solve(x^2-3=1) returns {-2,2}

solve({x^2-3=1, x+2=0},x) returns {-2}

330 Functions and commands