共轭梯度法的MATLAB程序答:共轭梯度法 function f=conjugate_grad_2d(x0,t)please input this:conjugate_grad_2d([2,2],0.05)x=x0;syms xi yi a f=xi^2-xi*yi+3*yi^2;fx=diff(f,xi);fy=diff(f,yi);fx=subs(fx,{xi,yi},x0);fy=subs(fy,{xi,yi},x0);fi=[fx,fy];count=0;while double(sqrt(...