Değişim hızı

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May 21, 2015, 4:30:55 AM5/21/15
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May 21, 2015, 4:39:27 AM5/21/15
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A=pi.r.r
dr/dt=0,2
dA/dt  soruluyor
dA/dt=dA/dr.dr/dt
=2.pi.r.dr/dt    r=10  yazalım
=2.pi.10.0,2
=4.pi


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