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Informatica an_3 P-2333

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Ce asigură proprietăţile funcţiei f(x)=0 pe segmentul dat la metoda injumatatirii?

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Completati regula selectind raspunsul:

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Carei metode apartine urmatorul program? (In program este data o functie ce corepsunde cu tema)

#include<iostream>

#include<math.h>

#define eps 0.00000000001

#define iter 200

double f(double x)

{

return x*x*x-2*x*x*cos(x)+x-3;

}

void main()

{

unsigned char i;

double x,x0,x1,a,b,y;

cout<<"a=";cin>>a;cout<<"b=";cin>>b;

i=0;x0=a;x1=b;x=x0;y=f(x);

if (f(x0)*f(x1)<0)

{

while ( (i<=iter) && ((y<-eps) || (y>eps)) )

{

x=(x0+x1)/2;

y=f(x);

if (f(x0)*y<0) x1=x; else x0=x;

cout<<"\n\nf("<<x<<")="<<f(x)<<" la iteratia "<<(int)i;

i++;

}

if (i>iter) cout<<"problema nu se poate rezolva in nr.maxim de iteratii";

} else cout<<"interval invalid";

}

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In ce caz se stopeaza procesul divizarii intervalului [a,b]?

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