matlab 怎样计算下面的公式?各位帮帮忙!我就这点财富,全给大家了!x=(0:pi/100:pi/2); h=0.01; l=(2:0.2:12); k=2.*pi./l; syms n x; y1=(k.*cos(90+x)).^2.*(n-1); y2=gamma(n+1); y3=y1./y2; y=symsum(y3,n,1,5);z=(abs(1+cos(90+x))).^2.*(k

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