求曲線Z=X^2+Y^2與Z=2-根號(X^2+Y^2)所圍立體體積
求曲線Z=X^2+Y^2與Z=2-根號(X^2+Y^2)所圍立體體積
數(shù)學(xué)人氣：927 ℃時間：2020-04-27 04:26:11
優(yōu)質(zhì)解答
x² + y² = zz = 2 - √(x² + y²) ==> √(x² + y²) = 2 - z ==> x² + y² = (2 - z)² = 4 - 4z + z²z = 4 - 4z + z² ==> z² - 5z + 4 = 0 ==> (z - 4)(z...
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