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Identitas ParsevalUntuk deret Fourier :Identitas Parseval :Periode Tf ( t)1TT∫0(=12f ( t))∞ ∑n=1( a cos nωt + b nωt)a0 +nnsin2dt=14a20+12∞∑( + )2 2anbnn=1Periode T = 2L1LL∫−L(f( t))2dt=12a20+∞∑( + )2 2anbnn=1Deret Fourier Komplek1TT∫0(f( t))2dt=∞∑n=−∞cnc*n=∞∑n=−∞cn2Matematika Teknik II( Ir. I Nyoman Setiawan, MT)3