.F[()=∫a()emat =o0 ○O 6(t) F(j0) JO 6()=」1 2兀0 1eod=2兀 cos atdo P80-81象曼一勒贝格2-9和2-100 6()分1(t-to)<>e0一 . F t t e dt j t   − − =  [ ( )]  ( ) 1 0 = = − j e  (t) t j F( j) 1    −  − = =        t e d t d j t cos 2 1 1. 2 1 ( )  (t) 1 0 ( ) 0 j t t t e    − − P80-81黎曼－勒贝格2-99和2－100