A2(-2x) MI =x、[A、-42-412(-2x:) A-41-12|>0 (3-27) Vnl+S=L+d (3-28) Lx+Dx D (3-30) y)=x-(x,]+2-x:(x,) (3-31) y 1-(x。)”1-(x,h h=L-(x,)]:vn=V-,片] 3-32) =-x+Dx(,)] (3-33) (x,b≈0 L ()1<(x,( ) ln ln 2 1 A x P P a s 2 s 1 +  −         = 12 1 (3-25)         s 2 s 1 P P 1 1 x = x   ( ) ln s 1s 12 2 1 x A A A x 2s s  =  −  −  −       1   (3-26) A1s  − A2s  − A12   0 (3-27) Vn+1 + S = Ln + D (3-28) DxD Vn+1 yn+1 = Ln xn+ (3-29) D x V D x V L y n 1 n n 1 n 1 + + + = + n (3-30)  ( )   ( )   ( )  s D n 1 n s n n 1 n 1 s n 1 1- y 1- x xD 1- x V D x V L y  =  +  + + + + n (3-31) ( ) ( ) ( ) s D d s n n n s n 1 n 1 n 1 1- x ; 1- x ; 1- y D x x x y y  =  =  = + + + x  ( )   ( )  s n n n s n ln = Ln 1− x ; v =V 1- y (3-32)  ( )  s D n 1 n n 1 n 1 xD 1- x v D x v l y  =  +  + + + n (3-33) (x ) 0 s D  D x v D x v l y  =  +  + + + n 1 n n 1 n 1 n (3-34) ( ) ( ) s n s n 1 n 1 n 1 n 1- x 1- y : + + + = v l V L n (3-35) ( ) ( ) s n 1 s n y  x + : 1 n 1 n 1 n  + + v l V L n