Euer方法 a=x0<x1<x2<……<xM1<xN=b, b x, =xo +jh, h ,j=1,2,…,N. -=y(x V=y+bf(x1,y),=0,1,…,N一 . Euler方法 0 0 1 ( ), ( , ), 0,1, , 1 i i i i y y x y y hf x y i N +  =  = + = −  0 1 2 1 0 , , , 1,2, , . N N j a x x x x x b b a x x jh h j N N =      = − − = + = =