作业帮matlab 化简公式,都是符号,有这个功能吗~a1=(u-1)/rb^2;a2=1/ra;b1=2(u+1);b2=2r;f1=q/d*(rb^2/8*(2*(u+1)lnrb+u+3)-(u+3)*rb^3/16);f2=q/d*(rb^2/8*(2*ra*lnra+ra)-ra^3/16);c1=(b2*f1-b1*f2)/(b2*a1-a2*b1);c2=-q*rb^4/8/d;c3=(a2*f1-a1*f2)/(b1*a2-a1*
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matlab 化简公式,都是符号,有这个功能吗~a1=(u-1)/rb^2;a2=1/ra;b1=2(u+1);b2=2r;f1=q/d*(rb^2/8*(2*(u+1)lnrb+u+3)-(u+3)*rb^3/16);f2=q/d*(rb^2/8*(2*ra*lnra+ra)-ra^3/16);c1=(b2*f1-b1*f2)/(b2*a1-a2*b1);c2=-q*rb^4/8/d;c3=(a2*f1-a1*f2)/(b1*a2-a1*
matlab 化简公式,都是符号,有这个功能吗~
a1=(u-1)/rb^2;
a2=1/ra;
b1=2(u+1);
b2=2r;
f1=q/d*(rb^2/8*(2*(u+1)lnrb+u+3)-(u+3)*rb^3/16);
f2=q/d*(rb^2/8*(2*ra*lnra+ra)-ra^3/16);
c1=(b2*f1-b1*f2)/(b2*a1-a2*b1);
c2=-q*rb^4/8/d;
c3=(a2*f1-a1*f2)/(b1*a2-a1*b2);
c4=-(c1*lnra+c2*ra^2*lnr+c3ra^2+c4+q*ra^4/64/d);
fr=c1*lnr+c2*r^2*lnr+c3r^2+c4+q*r^4/64/d;
最后要fr的总式~
matlab 化简公式,都是符号,有这个功能吗~a1=(u-1)/rb^2;a2=1/ra;b1=2(u+1);b2=2r;f1=q/d*(rb^2/8*(2*(u+1)lnrb+u+3)-(u+3)*rb^3/16);f2=q/d*(rb^2/8*(2*ra*lnra+ra)-ra^3/16);c1=(b2*f1-b1*f2)/(b2*a1-a2*b1);c2=-q*rb^4/8/d;c3=(a2*f1-a1*f2)/(b1*a2-a1*
matlab 可以化简公式,但你的语句c4=-(c1*lnra+c2*ra^2*lnr+c3ra^2+c4+q*ra^4/64/d);中c4没有初值,得不出结果.