matlab solve的用法S=dsolve('Dx=450*(90*t-x)/sqrt((90*t-x)^2+(120-y)^2),Dy=450*(120-y)/sqrt((90*t-x)^2+(120-y)^2)')结果:[y(t)=120,x(t)=450*t+C1,y(t)=120,x(t)=-450*t+C1,[((90*t-x(t))^2/diff(x(t),t)^2)^(1/2)=(90*t-x(t))/diff(x(t),t),y(t)=(120*dif
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matlab solve的用法S=dsolve('Dx=450*(90*t-x)/sqrt((90*t-x)^2+(120-y)^2),Dy=450*(120-y)/sqrt((90*t-x)^2+(120-y)^2)')结果:[y(t)=120,x(t)=450*t+C1,y(t)=120,x(t)=-450*t+C1,[((90*t-x(t))^2/diff(x(t),t)^2)^(1/2)=(90*t-x(t))/diff(x(t),t),y(t)=(120*dif
matlab solve的用法
S=dsolve('Dx=450*(90*t-x)/sqrt((90*t-x)^2+(120-y)^2),Dy=450*(120-y)/sqrt((90*t-x)^2+(120-y)^2)')
结果:[y(t)=120,x(t)=450*t+C1,y(t)=120,x(t)=-450*t+C1,[((90*t-x(t))^2/diff(x(t),t)^2)^(1/2)=(90*t-x(t))/diff(x(t),t),y(t)=(120*diff(x(t),t)+(-diff(x(t),t)^2*x(t)^2+1640250000*t^2-8100*diff(x(t),t)^2*t^2+180*diff(x(t),t)^2*t*x(t)-36450000*t*x(t)+202500*x(t)^2)^(1/2))/diff(x(t),t),y(t)=(120*diff(x(t),t)-(-diff(x(t),t)^2*x(t)^2+1640250000*t^2-8100*diff(x(t),t)^2*t^2+180*diff(x(t),t)^2*t*x(t)-36450000*t*x(t)+202500*x(t)^2)^(1/2))/diff(x(t),t)]]
这个怎么解释
如何求x(t),y(t)
matlab solve的用法S=dsolve('Dx=450*(90*t-x)/sqrt((90*t-x)^2+(120-y)^2),Dy=450*(120-y)/sqrt((90*t-x)^2+(120-y)^2)')结果:[y(t)=120,x(t)=450*t+C1,y(t)=120,x(t)=-450*t+C1,[((90*t-x(t))^2/diff(x(t),t)^2)^(1/2)=(90*t-x(t))/diff(x(t),t),y(t)=(120*dif
你在求解不定积分,出来的肯定是上面的符号表达式了.