[問題] 一題積分
Ix =∫∫∫(y^2+z^2)dxdydz of a mass of density 1 in a region T
T
about the x-axis. Find the Ix when T is as follows.
The cylinder y^2+z^2≦a^2 , 0≦x≦h
答案是 πha^4/2
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