[理工] 傅立葉轉換
10cos(2*pi*1000t)的F.T.我會做,頻譜我也會畫
但是他問的第二個題目
不太懂他想考什麼觀念?
是要考 F{x(t)*y(t)} = X(f)×Y(f) 的旋積性質嗎??
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