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1.abc为实数,a b c=1 a2 b2/a b
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2.已知实数a,b,c均不为零,且满足a b c=0,求1/(b2 c2−a2) 1/(c2 a2−b2) 1/( a2 b2−c2)的值( )
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3.已知实数a、b、c满足ab bc ca=1,求证:a2 b2 c2≥1.
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4.已知a、b、c、d为实数,比较(a2 b2)(c2 d2)与(ac bd)2的大小.
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5.在△ABC中,a2 b2 ab=c2,则∠C=______.
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6.已知△ABC中,AB=c,AC=b,BC=a,若a2 b2 c2=ab bc ca,则△ABC的形状是 ______.
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7.已知实数a,b满足a2 a=3b2 2b,且a,b>0,则(C a2b
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8.已知实数a,b满足a2 a=3b2 2b,且a,b>0,则(C a2b
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9.设A、B为n阶方阵,满足A2=B2,则必有()
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10.已知a b c=4,ab bc ac=4,那么a2 b2 c2=______.