求方程在0.5附近的根，相应的命令是（）。

A.>> fx=@(x) x-sin(x)/x;>> z=fzero(fx,0.5)

B.>> z=fzero(@(x) x-sin(x)/x,0.5)

C.>> fx=@(x) x-sin(x)/x;>> z=fsolve(fx,0.5)

D.>> z=fsolve(@(x) x-sin(x)/x,0.5)

正确答案：>> fx=@(x) x-sin(x)/x;>> z=fzero(fx,0.5)；>> z=fzero(@(x) x-sin(x)/x,0.5)；>> fx=@(x) x-sin(x)/x;>> z=fsolve(fx,0.5)；>> z=fsolve(@(x) x-sin(x)/x,0.5)