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Dec 17th, 2018
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  1. function I=trapez(a,b,c)
  2. a=0;
  3. b=1;
  4. h=(b-a)/2
  5. f=@(x) 2./(1+x.^2);
  6. fp2=@(x) 16*x.^2/((x.^2+1).^3)-4/((x.^2+1).^2);
  7. r=feval(fp2,c)./(12).*(b-a).^3
  8. I=h*(f(a)+f(b))-r
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