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(Область Vизображена на рис. 13.44.)<br />

Переходим к цилиндрическим координатам по формулам<br />

х = pcosq>, z = р sinф , у = у . Тогда<br />

zn 2л i 2 53~Г<br />

- р<br />

2<br />

/.. = 8 jjjp 2pdpd(pdy = 8 [

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