HP 48gII Graphing Calculator Uživatelský manuál stáhnout pdf (Strana 510)

• First, define a function c(n) representing the general term c

in the complex

Fourier series.

• Next, define the finite complex Fourier series, F(X,k), where X is the

independent variable and k determines the number of terms to be used.

Ideally we would like to write this finite complex Fourier series as

However, because the function c(n) is not defined for n = 0, we will be

better advised to re-write the expression as

+= 0)0,,( cckXF

Or, in the calculator entry line as:

DEFINE(‘F(X,k,c0) = c0+Σ(n=1,k,c(n)*EXP(2*i*π*n*X/T)+

c(-n)*EXP(-(2*i*π*n*X/T))’),

where T is the period, T = 2. The following screen shots show the definition of

function F and the storing of T = 2:

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HP 48gII Graphing Calculator Uživatelský manuál Strana 510