bài toàn tìm Min, Max

N

nguyenbahiep1

[laTEX]P(x+1) = -(\frac{3x+3}{\sqrt{x}-2}) \\ \\ - (3\sqrt{x}+6 + \frac{15}{\sqrt{x}-2}) \\ \\ - (3(\sqrt{x}-2) + \frac{15}{\sqrt{x}-2} + 12 ) \leq -(6\sqrt{5} +12) \\ \\ Max = -(6\sqrt{5} +12) \\ \\ dau-bang-xay-ra: \sqrt{x} -2 = \sqrt{5} \Rightarrow x = 9+4\sqrt{5}[/laTEX]
 
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