e tan 在 If y=e^tan-1x , prove that (1+x^2) yn+2+{2(n+1)x-1 ... - YouTube 的評價 If y= e ^ tan -1x , prove that (1+x^2) yn+2+{2(n+1)x-1}yn+1+n(n+1)yn=0. ... <看更多>
