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# Evaluate the triple integral of 3*e^(3x+3y+z) when E is the tetrahedron having one vertex at the origin and three adjacent faces in the coordinate...

Evaluate the triple integral of 3*e^(3x+3y+z) when E is the tetrahedron having one vertex at the origin and three adjacent faces in the coordinate planes. Points of tetrahedron are at: (0,0,0) , (0,0,3) , (1,0,0) , (0,1,0).