matlab fzero 问题

matlab fzero 问题function v=dxt2(x1,x2)n=0.0109;d=sqrt((x2(1)-x1(1))^2+(x2(2)-x1(2))^2);i=(x2(2)-x1(2))/d;y=2.5*sqrt(n)-0.13-0.75*sqrt(2.2/4)*(sqrt(n)-0.1);x=fzero(@(x)1/n*2.2/4*(1-sin(x)/x)^(y+1/2)*2.2^2/8*(x-sin(x))*sqrt(i)-0.6,0.5);a=2.2^2/8*(x-sin(x));v=d*a;调用是错误：? Error using ==> fzeroFunction value at starting guess must be finite and real.Error in ==> dxt2 at 6x=fzero(@(x)1/n*2.2/4*(1-sin(x)/x)^(y+1/2)*2.2^2/8*(x-sin(x))*sqrt(i)-0.6,0.5);求解释,怎么改?,急