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Q41Section II (Mathematics)41 of 190

An odd integrand over a centrally symmetric slice vanishes

Let f:D→Rf:D\to\mathbb{R} be defined as f(x,y,z)=xyzf(x,y,z)=xyz, where D={(x,y,z)∈R3/x2+y2+z2<1}D=\{(x,y,z)\in\mathbb{R}^3/x^2+y^2+z^2<1\}. Let P denote the plane {(x,y,z)/2x+3y+5z=0}\{(x,y,z)/2x+3y+5z=0\}. Then ∫D∩Pf dx dy dz\int_{D\cap P}f\,dx\,dy\,dz is:

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