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Reduce the equation to standard form and determine the nature of the conicoid: x2+y2+z2yzzxxy3x6y9z+21=0.
asked
Jan 7
pyqs
2017
3d
analyticalgeometry
0
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1
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Integrate the function $f(x,y) = xy(x^2+y^2)$ over the domain $R : { 3 <= x^2y^2<3, 1 <=xy <=4 }$
asked
Jan 5
calculus
pyqs
2017
integration
37
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2
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