[求助]请高手解决个微分方程，扣谢

keith

d(y1*r^2)/dr=-6.4*y2*r^2
) G$ D% M! `# W# @* {1 \ dy2/dr=-10*y1
dy3/dr=120*y2*r^2
8 k# X: Z, G9 ?% v+ w . C. S1 g; e7 [+ n0 _
2 B! o A D- a( d' I8 | 2 L$ C1 ~9 _+ T( l(y1*r^2)(r=0)=0
0 f# d: f( h( g) W% E |7 B0 e $ N% v7 ?# m& S, `3 ] Q(y2)(r=R)=0.2
8 ^8 K3 w8 g, Y9 e3 g + i9 J8 V; s+ S1 i1 Xy3(r=0)=0
9 L* z' F% B4 s7 T# v! Y 6 q) T5 F- f6 F Y: H; l
请教高手用matlab该如何解决这题，谢谢！