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標題:
IMO---1960(inequality)
發問:
Please refer to the following question: 圖片參考:http://hk.geocities.com/stevieg_1023/IMO1960.gif
最佳解答:
For the function to be well defined, we must have x>-1/2 and x≠0. Suppose x satisfies these conditions, then 4x^2 / (1-√(1+2x))^2 -1/2, 2x+9 > 0. and 11x+9 > 0, so the above inequality is equivalent to (2x+9)^2 (1+2x)
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