[積分] 旋轉體體積

[caxz (虛幻夢影)]

(1)
the region R is bounded by y=(x)^1/2 , y=1 and x=4
求:該區域繞y=1旋轉的旋轉體積

(2)
類似:
the region R is bounded by y = 1/x, y=x^2 and x=2
求R繞x=2的旋轉體體積



感激....
請教一下如何擺出正確的積分形式

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