[積分]重積分政大93應數
5 √(25-x^2) √(25-x^2-y^2)
∫∫ ∫ 1/(1+x^2+y^2+z^2)dzdydx
0 0 0
還有這題
∫∫y/(x^2+y^2)dA,where R is the triangle bounded by y=x,y=2x,x=2
R
請高手幫忙,謝謝!
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