赞 暖暖34940081 幼苗
共回答了18个问题采纳率：88.9% 举报
是一个高为1的碗形旋转抛物面,底圆半径为1,
转换成极坐标,V=4∫[0,π/2]dθ∫[0,1][（rcosθ)^2+(rsinθ)^2]rdr
=4∫[0,π/2]dθ∫[0,1]r^3dr
=4∫[0,π/2] (r^4/4)[0,1]dθ
=[∫[0,π/2]dθ
=π/2.
转换成极坐标,V=4∫[0,π/2]dθ∫[0,1][（rcosθ)^2+(rsinθ)^2]rdr
=4∫[0,π/2]dθ∫[0,1]r^3dr
=4∫[0,π/2] (r^4/4)[0,1]dθ
=[∫[0,π/2]dθ
=π/2.
1年前
10
可能相似的问题
你能帮帮他们吗