SECHANT METHOD

SECHANT METHOD

4 akar dari Fungsi Persamaan Berikut :

(f = x^4+2*x^3-7*x^2+3)

KOde MAtlab :

%SECANT METOHD

syms x

f = x^4-2*x^3+7*x^2+3;

a =0.1;

b=0.3;

n = 100;

ea = 0.000001;

N = [];

for i = 1:n

    fa = subs (f,x,a);

    fb = subs (f,x,b);

    c = b - (((b-a)/(fb-fa))*fb);

    es = abs((c-a)/c);

    fc= subs(f,x,c);

    d=c-(((c-b)/(fc-fb))*fb);

    es1= abs((d-b)/d);

    if es <= ea;

        break

    end

     a = b;

     b = c;

    N=[N; i a b c d es es1]

end

plot (N(:,1),N(:,7),'--gs','LineWidth',3,...

'MarkerEdgeColor','k',...

'MarkerFaceColor','g',...

'MarkerSize',5)

title ('SECANT METHOD')

xlabel ('Iterasi')

ylabel ('%error')

grid