以7(x)·(2) 7yx)+(x)p(x)y(x)+7(x)h(x)y(x)=0 而(1)→k(x)y(x)+(x)y(x)+[-x)+p(x)y=0 7(x)=K(x) 对比得:{7(x)p(x)=K(x) 7(x)(x)=-q(x)+p(x) (3)(4):7(x)p(x)=K1() T"(x) (r)p(x), InT()=Jp(x dx, K(x)=T(x)=eiplnjdr T∵ 以 T x( ) ×(2) : Ty¢¢ ¢ (x) + T (x)r(x) y (x) + = T (x)h(x) y x( ) 0 而（1）→ k x( ) y¢¢(x) + k¢ ¢ (x) y (x) + [-q(x) + = lr(x y ) 0 ] 对比得： ( ) ( ) (3) ( ) ( ) ( ) (4) ( ) ( ) - ( ) ( ) (5) T x K x T x x K x T x h x q x x r lr ì = ï í = ¢ ï = + î （3）（4）：T(x)r l (x K ) = '( ) ( ) ( ) ( ), ln ( ) ( ) , ( ) ( ) ( ) T x x dx x T X x dx K x T x e T x r r r ò ¢ = = ò = =