matlab解y关于x的二阶微分方程E*y+(h²/8π²m)*(d2y/dx2)=0 为什么解出来的y里面不含有E【h,m值已知】,h=6.626*10^(-34) m=1.66*10^(-27)
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![matlab解y关于x的二阶微分方程E*y+(h²/8π²m)*(d2y/dx2)=0 为什么解出来的y里面不含有E【h,m值已知】,h=6.626*10^(-34) m=1.66*10^(-27)](/uploads/image/z/15003839-47-9.jpg?t=matlab%E8%A7%A3y%E5%85%B3%E4%BA%8Ex%E7%9A%84%E4%BA%8C%E9%98%B6%E5%BE%AE%E5%88%86%E6%96%B9%E7%A8%8BE%2Ay%2B%EF%BC%88h%26%23178%3B%2F8%CF%80%26%23178%3Bm%29%2A%28d2y%2Fdx2%29%3D0+%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A7%A3%E5%87%BA%E6%9D%A5%E7%9A%84y%E9%87%8C%E9%9D%A2%E4%B8%8D%E5%90%AB%E6%9C%89E%E3%80%90h%2Cm%E5%80%BC%E5%B7%B2%E7%9F%A5%E3%80%91%2Ch%3D6.626%2A10%5E%28-34%29+m%3D1.66%2A10%5E%28-27%29)
matlab解y关于x的二阶微分方程E*y+(h²/8π²m)*(d2y/dx2)=0 为什么解出来的y里面不含有E【h,m值已知】,h=6.626*10^(-34) m=1.66*10^(-27)
matlab解y关于x的二阶微分方程E*y+(h²/8π²m)*(d2y/dx2)=0 为什么解出来的y里面不含有E
【h,m值已知】,h=6.626*10^(-34) m=1.66*10^(-27)
matlab解y关于x的二阶微分方程E*y+(h²/8π²m)*(d2y/dx2)=0 为什么解出来的y里面不含有E【h,m值已知】,h=6.626*10^(-34) m=1.66*10^(-27)
>> syms E x y
>> y=dsolve('E*y+6.626e-34/8/pi^2/1.66e-27*D2y=0','x')
y =
C2*cos((100000000000000000000*pi*498945783132530120481927710843373^(1/2)*x*exp(1/2))/498945783132530120481927710843373) + C3*sin((100000000000000000000*pi*498945783132530120481927710843373^(1/2)*x*exp(1/2))/498945783132530120481927710843373)
>> vpa(y)
ans =
C2*cos(23188.381421487632207604131471235*x) + C3*sin(23188.381421487632207604131471235*x)
方程的解中含两个常数C2,C3,而没有C1,说明C1和E被某个数,C2或C3,替换了