1.设定义在R上的函数f(x)满足f(x)·f(x+2)=12,且f(2009)=2,则f(-1)=A.12 B.6 C.3 D.22.已知a>0,b>0,c>0,且a+b+c=1,则1/(a+b) + 4/c的最小值等于A.13.5 B.12 C.10 D.9
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![1.设定义在R上的函数f(x)满足f(x)·f(x+2)=12,且f(2009)=2,则f(-1)=A.12 B.6 C.3 D.22.已知a>0,b>0,c>0,且a+b+c=1,则1/(a+b) + 4/c的最小值等于A.13.5 B.12 C.10 D.9](/uploads/image/z/8624099-11-9.jpg?t=1.%E8%AE%BE%E5%AE%9A%E4%B9%89%E5%9C%A8R%E4%B8%8A%E7%9A%84%E5%87%BD%E6%95%B0f%28x%29%E6%BB%A1%E8%B6%B3f%28x%29%C2%B7f%28x%2B2%29%3D12%2C%E4%B8%94f%282009%29%3D2%2C%E5%88%99f%28-1%29%3DA.12+B.6+C.3+D.22.%E5%B7%B2%E7%9F%A5a%3E0%2Cb%3E0%2Cc%3E0%2C%E4%B8%94a%2Bb%2Bc%3D1%2C%E5%88%991%2F%28a%2Bb%29+%2B+4%2Fc%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E7%AD%89%E4%BA%8EA.13.5+B.12+C.10+D.9)
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