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September9,2010
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2.=O?.?’>??>? ?? u??§ùFá“L?a?v(t)=
10+20cos(2π60t?25?)+30cos(4π60t+20?)§d>?\13??G é{aK1t§R=5?§L=15mH§|K1?? 2t??P"J F?2010-09-13§>í!?U§2010-09-212)>í
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