aIn(1+2 )-。ln(+)+2kx]-12kx,ocln(+) e e +=)=121+az+ 6)=+2+- <1 ∑:,|2|< 2> 若能a=2,k=?( z) [ ( z) i k ] i k ( z) e e e e + + + + = = × a ln 1 a ln 1 2 p 2 p a ln 1 ( ) ( ) ê ë é + - \ + = + + ... 2! 1 1 1 1 2 z z z a a a a a ( )( ) ... , 1 ! 1 1 < ú û ù + - - + + z z k a a a k k , 1 1 1 0 = < - å ¥ = z z z k k , 1 1 1 0 ? = > - å ¥ = a z z z k k k a = ?, k = ? 若能 k