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- xmin=2;
- xmax=11;
- nbPts=10;
- T = (xmax-xmin);
- h = T/(nbPts-1);
- for i=1:nbPts
- x(i)=xmin+(T/(nbPts-1))*(i-1);
- y(i) = 2*x(i).^3 ;
- end
- der = diff(y)/h;
- figure(1)
- hold on;
- plot(x,y);
- plot(x(:,1:end-1),der); %Vue que la matrice der est plus petite que celle de x, on prend l'avant dernière valeur de x
- end
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