matlab 误差上界

x=[0.6 0.7 0.8 0.9 1.0];
y=[1.433329 1.632316 1.896481 2.247908 2.718282];
c=newtdd(x,y,5);

P4_082=nest(4,c,0.82,[0.6 0.7 0.8 0.9]);
P4_098=nest(4,c,0.98,[0.6 0.7 0.8 0.9]);


f5=@(x) -8*x*(4*x^4+20*x^2+15)*exp(x^2);
f_5max=fminbnd(f5,0.6,1);       %%这边可能有问题
g=@(x) exp(x^2);
h=@(x) (x-0.6)*(x-0.7)*(x-0.8)*(x-0.9)*(x-1);
Ec1=f_5max*h(0.82)/120  %%这边与答案结果不同
Er1=abs(P4_082-g(0.82))
Ec2=f_5max*h(0.98)/120  %%这边与答案结果不同
Er2=abs(P4_098-g(0.98))