... text(xn,fxn,'*nghiem') fprintf(&apos ;cac nghiem cua pt:') xn Bai 29 %bai toan cauchy %caua giai hptvp voi dk ban dau [-7. 69 -15.61 90 . 39] );dy=inline('[10*(u(2)-u(1));126.52*u(1)-u(2)-u(1)*u(3);u(1)*u(2)-8/3*u(3)]','t','u')[t,u]=ode45(dy,[0 ... dau!!!%cau afunction tong= bai3 a(n,x) s=0; for k=1:n s=s+((-1).^k./k).*((-(x-1).^k).*(x>0 & x<1)+((1./x-1).^k).*(x>=1)); end tong= s % bai3 b function tong= bai3 b(x) ak=1; ss=1e-6; ... s1=s1+ak; end tong= s1 %bai 3c x=0.1:0.1:10; plot(x ,bai3 a(1,x),'r');hold on; plot(x ,bai3 a(5,x),'c');hold on; plot(x ,bai3 a(10,x),'b');hold on; plot(x ,bai3 b(x),'m');hold...