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howadtse
Joined: 22 Sep 2004Posts: 6
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Posted: Mon Mar 21, 2005 9:44 pm Post subject: Special Inequality
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a,b,c為正實數 求證:
(a+3c)/(a+2b+c)+4b/(a+b+2c)-8c/(a+b+3c)>=-17+12*2^0.5
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howadtse
Joined: 22 Sep 2004Posts: 6
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Posted: Mon Mar 21, 2005 9:46 pm Post subject:
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有冇d咩方法丫??
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Soarer
Frequent VisitorJoined: 18 Jan 2004Posts: 213
Location: Hong Kong
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Posted: Mon Mar 21, 2005 10:29 pm Post subject:
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let x=a+2b+c, y=a+b+2c,z=a+b+3c and it should not be too difficult.
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