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my code is: And so far only the (K) is wrong.

N = 1000;

a= 0;

b= pi;

h = (b-a)/N;

x=a:h:b;

f = x.^2.*sin(x);

F = sum(f*h );

a= 1;

b= 2;

h = (b-a)/N;

x=a:h:b;

g =(x.^3.2 + 2.*x.^2.22 +x + 21) ;

G = sum(g*h) ;

a=-3 ;

b= 3;

h = (b-a)/N;

x=a:h:b;

k =abs(x).*exp(-x).^2 ;

K = sum(k*h);

Image Analyst
on 27 May 2020

What is "the above technique"?

Try using trapz() instead of sum.

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