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 Htftedtftedttedttedtee ()()()(2)1(21)    t , 0t<1h(t)=2-t , 1t<20 , t<0 & t>2   Ftftedtedtei  1()()(1)

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2014/06/04 檔名: Quiz 2014-06-04-No.12(sol) .doc 怡絹製表

陳正宗終身特聘教授

Homework 2014-06-04 工程數學(二) 2B 班 第十二次課堂小考(解答)

系級: 學號: 姓名:

請做出以下傅立葉轉換 (1)

(2) f(t)

t

( ) 1 0

, 0 t 1 f t

, otherwise

  

 

1 2 t

h(t)

t , 0 t<1 h(t)= 2-t , 1 t<2

0 , t<0 & t>2

 

 



  

1 1

0 0

( ) ( ) i t i t 1 ( i 1)

F t f t e dt e dt e

i

  

1 2

0 1

1 2

0 1

2 2

( ) ( ) ( )

(2 )

1 (2 1)

i t i t

i t i t

i i

H t f t e dt f t e dt

te dt t e dt

e e

 

  

  

 

 

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